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    <link:label id="lab_us-gaap_LeasesAbstract_E9BF54C2F3E73B6EB41C5F1CEE995B75_label_en-US" xlink:label="lab_us-gaap_LeasesAbstract_E9BF54C2F3E73B6EB41C5F1CEE995B75" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leases [Abstract]</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_7A6AF13D5089EB29804E5F1CEE990559_label_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_7A6AF13D5089EB29804E5F1CEE990559" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_7A6AF13D5089EB29804E5F1CEE990559" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_23EE1369A3017BEBCB145F1CEE99DA34_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_23EE1369A3017BEBCB145F1CEE99DA34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_95F3C32607B73BF3BA0D5F1CEE9A8F40_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_95F3C32607B73BF3BA0D5F1CEE9A8F40" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_CCA7397C789F80B8F7955F1CEE9A3B02_terseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_CCA7397C789F80B8F7955F1CEE9A3B02" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024</link:label>
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    <link:label id="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BC7CBEB0A53B4A4D4CF45F1CEE9B641B_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_BC7CBEB0A53B4A4D4CF45F1CEE9B641B" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Less: Imputed interest</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiability" xlink:label="loc_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25" xlink:to="lab_us-gaap_OperatingLeaseLiability_21E68960330813B1C0115F1CEEA0DF25" xlink:type="arc" />
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    <link:label id="lab_otex_MaturityofLeaseLiabilitiesTopic842_FC0555E99D6E1FB7C0965F1CEEA0114A_documentation_en-US" xlink:label="lab_otex_MaturityofLeaseLiabilitiesTopic842_FC0555E99D6E1FB7C0965F1CEEA0114A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maturity of Lease Liabilities, Topic 842 [Abstract]</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_6EA2465DE2CD1CE2AA135F1CEEA184CD_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_6EA2465DE2CD1CE2AA135F1CEEA184CD" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Current operating lease liabilities</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_6EA2465DE2CD1CE2AA135F1CEEA184CD_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_6EA2465DE2CD1CE2AA135F1CEEA184CD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Current</link:label>
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    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Non-current operating lease liabilities</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5" xlink:to="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_804B7E4078BE7A3506E15F1CEEA1A1E5" xlink:type="arc" />
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E_terseLabel_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sublease income to be received next fiscal year</link:label>
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E_label_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Sublease, Payments to be Received, Year One</link:label>
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E_documentation_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Sublease, Payments to be Received, Year One</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne" xlink:label="loc_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:to="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedYearOne_9019EE9DAB99B71D7B685F1CEEA16E0E" xlink:type="arc" />
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9_terseLabel_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sublease income to be received thereafter</link:label>
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9_label_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Sublease, Payments to be Received, Thereafter</link:label>
    <link:label id="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9_documentation_en-US" xlink:label="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Lessee, Operating Lease, Sublease, Payments to be Received, Thereafter</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter" xlink:label="loc_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:to="lab_otex_LesseeOperatingLeaseSubleasePaymentstobeReceivedThereafter_61DC23197E44970C49535F1CEEA2B6C9" xlink:type="arc" />
    <link:label id="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99_terseLabel_en-US" xlink:label="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Previously reported as</link:label>
    <link:label id="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99_label_en-US" xlink:label="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Maturity of Lease Liabilities, Topic 840</link:label>
    <link:label id="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99_documentation_en-US" xlink:label="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Maturity of Lease Liabilities, Topic 840 [Abstract]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_MaturityofLeaseLiabilitiesTopic840" xlink:label="loc_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:to="lab_otex_MaturityofLeaseLiabilitiesTopic840_3565FBE54A806F7623755F1CEEA23E99" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E_verboseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments Due, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueCurrent_015539E5B93084850DBA5F1CEEA2787E" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Two Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInTwoYears_6D6441684DEECF3980695F1CEEA276EB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Three Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C" xlink:to="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInThreeYears_84FA45EF3678AAECC7515F1CEEA2384C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_726BD69644E4F9F8F4145F1CEEA33989_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_726BD69644E4F9F8F4145F1CEEA33989" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_726BD69644E4F9F8F4145F1CEEA33989_label_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_726BD69644E4F9F8F4145F1CEEA33989" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Future Minimum Payments, Due in Four Years</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears" xlink:label="loc_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFourYears_726BD69644E4F9F8F4145F1CEEA33989" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C0FBA3F98B3104D0F2B85F1CEEA35E7D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasesFutureMinimumPaymentsDueInFiveYears_C0FBA3F98B3104D0F2B85F1CEEA35E7D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationsAbstract_A74FD365BC10B35D1ED55F1CEB9533FC_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationsAbstract_A74FD365BC10B35D1ED55F1CEB9533FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combinations [Abstract]</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_16520DCD6AA21925598C5F1CF174D234_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_16520DCD6AA21925598C5F1CF174D234" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_16520DCD6AA21925598C5F1CF174D234_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_16520DCD6AA21925598C5F1CF174D234" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_E8EA465AC9BF161BC8085F1CF17461EC_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_E8EA465AC9BF161BC8085F1CF17461EC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts receivable trade, net of allowance for doubtful accounts of $20,906 as of June 30, 2020 and $17,011 as of June 30, 2019 (note 4)</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerAssetNetCurrent_28CCC02A6F04B86D52055F1CF1756643_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNetCurrent_28CCC02A6F04B86D52055F1CF1756643" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, after Allowance for Credit Loss, Current</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property and equipment (note 5)</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_B63D9DB882090BB8172F5F1CF176F867" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease right of use assets (note 6)</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Right-of-Use Asset</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688" xlink:to="lab_us-gaap_OperatingLeaseRightOfUseAsset_A60F3A1B75F88248CE945F1CF176F688" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39_verboseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term contract assets (note 3)</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Asset, after Allowance for Credit Loss, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39" xlink:to="lab_us-gaap_ContractWithCustomerAssetNetNoncurrent_6BC5CEE9D99BF4E25F535F1CF176FB39" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C_verboseLabel_en-US" xlink:label="lab_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Goodwill (note 7)</link:label>
    <link:label id="lab_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C_label_en-US" xlink:label="lab_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C" xlink:to="lab_us-gaap_Goodwill_6C317DD7AD7FD26651325F1CF176EC4C" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquired intangible assets (note 8)</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_6516773E23DEB7E273765F1CF177E3FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax assets (note 15)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet_79D1DE825DB3E2809B555F1CF1777ACB" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other assets (note 9)</link:label>
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9_label_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Assets, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9" xlink:to="lab_us-gaap_OtherAssetsNoncurrent_BA3765E99AF838C81C045F1CF17713D9" xlink:type="arc" />
    <link:label id="lab_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term income taxes recoverable (note 15)</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Receivable, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_IncomeTaxesReceivableNoncurrent" xlink:label="loc_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47" xlink:to="lab_us-gaap_IncomeTaxesReceivableNoncurrent_32915E303C42288691125F1CF1776C47" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total assets</link:label>
    <link:label id="lab_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C_label_en-US" xlink:label="lab_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C" xlink:to="lab_us-gaap_Assets_046595924CCA239A03025F1CF178AD8C" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND SHAREHOLDERS&#8217; EQUITY</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_4E7ABE4257EA9AD9FB005F1CF178B973" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract_70332B8EDB11E662F8DC5F1CF178CA31" xlink:type="arc" />
    <link:label id="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10_terseLabel_en-US" xlink:label="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and accrued liabilities (note 10)</link:label>
    <link:label id="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10_label_en-US" xlink:label="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Current Accounts Payable And Accrued Liabilities Plus Other Accruals</link:label>
    <link:label id="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10_documentation_en-US" xlink:label="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Current Accounts Payable And Accrued Liabilities Plus Other Accruals</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals" xlink:label="loc_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:to="lab_otex_CurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_3F97CCD329FBB2AE79685F1CF178FC10" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7_terseLabel_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Current portion of long-term debt (note 11)</link:label>
    <link:label id="lab_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7_label_en-US" xlink:label="lab_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Long-term Debt, Current Maturities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermDebtCurrent" xlink:label="loc_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7" xlink:to="lab_us-gaap_LongTermDebtCurrent_A8F8616279AD6239CCFA5F1CF17988A7" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityCurrent_EB7212003AFBD5BD10EB5F1CF179DC82_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityCurrent_EB7212003AFBD5BD10EB5F1CF179DC82" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating lease liabilities (note 6)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityCurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_EB7212003AFBD5BD10EB5F1CF179DC82" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityCurrent_EB7212003AFBD5BD10EB5F1CF179DC82" xlink:to="lab_us-gaap_OperatingLeaseLiabilityCurrent_EB7212003AFBD5BD10EB5F1CF179DC82" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC_verboseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred revenues (note 3)</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityCurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityCurrent_9DCE7D74D65D7C17B3A45F1CF17933CC" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_B48D7A69820DDD9AB65F5F1CF17913E8_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_B48D7A69820DDD9AB65F5F1CF17913E8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes payable (note 15)</link:label>
    <link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_B48D7A69820DDD9AB65F5F1CF17913E8_label_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_B48D7A69820DDD9AB65F5F1CF17913E8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Income Taxes, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_B48D7A69820DDD9AB65F5F1CF17913E8" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65" xlink:to="lab_us-gaap_LiabilitiesCurrent_B43AAD714B04C40CDFF75F1CF17ADD65" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term liabilities:</link:label>
    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Noncurrent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345" xlink:to="lab_us-gaap_LiabilitiesNoncurrentAbstract_91794A8991F9E62FB3B55F1CF17A2345" xlink:type="arc" />
    <link:label id="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD_terseLabel_en-US" xlink:label="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued liabilities (note 10)</link:label>
    <link:label id="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD_label_en-US" xlink:label="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non current Accounts Payable And Accrued Liabilities Plus Other Accruals</link:label>
    <link:label id="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD_documentation_en-US" xlink:label="lab_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non current Accounts Payable And Accrued Liabilities Plus Other Accruals</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals" xlink:label="loc_otex_NonCurrentAccountsPayableAndAccruedLiabilitiesPlusOtherAccruals_920B18838BCB09FB7D595F1CF17AE6AD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077_terseLabel_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension liability (note 12)</link:label>
    <link:label id="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077_label_en-US" xlink:label="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability, Defined Benefit Plan, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent" xlink:label="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077" xlink:to="lab_us-gaap_PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesNoncurrent_5E3266D37BA7B7D040935F1CF17B4077" xlink:type="arc" />
    <link:label id="lab_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2_verboseLabel_en-US" xlink:label="lab_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Long-term debt (note 11)</link:label>
    <link:label id="lab_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2_label_en-US" xlink:label="lab_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loans Payable to Bank, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LongTermLoansFromBank" xlink:label="loc_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2" xlink:to="lab_us-gaap_LongTermLoansFromBank_0EEE103E1149D1B22B5E5F1CF17B1FD2" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_AA39353499504DABEB275F1CF17B8405_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_AA39353499504DABEB275F1CF17B8405" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term operating lease liabilities (note 6)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_AA39353499504DABEB275F1CF17B8405" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_AA39353499504DABEB275F1CF17B8405" xlink:to="lab_us-gaap_OperatingLeaseLiabilityNoncurrent_AA39353499504DABEB275F1CF17B8405" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D_verboseLabel_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Deferred revenues (note 3)</link:label>
    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D" xlink:to="lab_us-gaap_ContractWithCustomerLiabilityNoncurrent_85B3769ADD157ACEA9975F1CF17BEF0D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Long-term income taxes payable (note 15)</link:label>
    <link:label id="lab_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6_label_en-US" xlink:label="lab_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Uncertainty in Income Taxes, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsNoncurrent" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6" xlink:to="lab_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_EA1FCE3C5969FCB870065F1CF17C0AD6" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred tax liabilities (note 15)</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D" xlink:to="lab_us-gaap_DeferredIncomeTaxLiabilitiesNet_B869A931722153057B795F1CF17C168D" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total long-term liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE" xlink:to="lab_us-gaap_LiabilitiesNoncurrent_77998845C8ABB363D41D5F1CF17CADFE" xlink:type="arc" />
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_7D5622AD853980A5231B5F1CF17CD77D_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_7D5622AD853980A5231B5F1CF17CD77D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shareholders&#8217; equity:</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_7D5622AD853980A5231B5F1CF17CD77D_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_7D5622AD853980A5231B5F1CF17CD77D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_7D5622AD853980A5231B5F1CF17CD77D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_7CFC1871C28B37E35AAA5F1CF17C1DD7_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_7CFC1871C28B37E35AAA5F1CF17C1DD7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Share capital and additional paid-in capital (note 13): 271,634,149 and 269,834,442 Common Shares issued and outstanding at June 30, 2020 and June 30, 2019, respectively; authorized Common Shares: unlimited</link:label>
    <link:label id="lab_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_7CFC1871C28B37E35AAA5F1CF17C1DD7_label_en-US" xlink:label="lab_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_7CFC1871C28B37E35AAA5F1CF17C1DD7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stocks, Including Additional Paid in Capital</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CommonStocksIncludingAdditionalPaidInCapital" xlink:label="loc_us-gaap_CommonStocksIncludingAdditionalPaidInCapital_7CFC1871C28B37E35AAA5F1CF17C1DD7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_45C841D7B698281459C75F1CF17DD69F_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_45C841D7B698281459C75F1CF17DD69F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accumulated other comprehensive income (note 21)</link:label>
    <link:label id="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_45C841D7B698281459C75F1CF17DD69F_label_en-US" xlink:label="lab_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_45C841D7B698281459C75F1CF17DD69F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Other Comprehensive Income (Loss), Net of Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_45C841D7B698281459C75F1CF17DD69F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_899F66DEA628BDCCBEBA5F1CF17DBCE7_terseLabel_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_899F66DEA628BDCCBEBA5F1CF17DBCE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Retained earnings</link:label>
    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_899F66DEA628BDCCBEBA5F1CF17DBCE7_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_899F66DEA628BDCCBEBA5F1CF17DBCE7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
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    <link:label id="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3_terseLabel_en-US" xlink:label="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 1, 2020 - June 30, 2021</link:label>
    <link:label id="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3_label_en-US" xlink:label="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3" xlink:to="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueInRemainderOfFiscalYear_95CE06CCA786F979AE955F1CF3438CC3" xlink:type="arc" />
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0_terseLabel_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 1, 2021 - June 30, 2023</link:label>
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0_label_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation Due in Second and Third Year</link:label>
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0_documentation_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation Due in Second and Third Year</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear" xlink:label="loc_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:to="lab_otex_RecordedUnconditionalPurchaseObligationDueInSecondAndThirdYear_5AE235FE9FBA2EED845E5F1CF343EDE0" xlink:type="arc" />
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958_terseLabel_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 1, 2023 - June 30, 2025</link:label>
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958_label_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation Due in Fourth and Fifth Years</link:label>
    <link:label id="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958_documentation_en-US" xlink:label="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation Due in Fourth and Fifth Years</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears" xlink:label="loc_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:to="lab_otex_RecordedUnconditionalPurchaseObligationDueInFourthAndFifthYears_50A0C1043B3C7A24D4755F1CF343E958" xlink:type="arc" />
    <link:label id="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD_terseLabel_en-US" xlink:label="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">July 1, 2025 and beyond</link:label>
    <link:label id="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD_label_en-US" xlink:label="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Recorded Unconditional Purchase Obligation, to be Paid, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear" xlink:label="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD" xlink:to="lab_us-gaap_RecordedUnconditionalPurchaseObligationDueAfterFifthYear_8A795A8047FC74E2ED2F5F1CF34326DD" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B_terseLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total payments due between</link:label>
    <link:label id="lab_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B_label_en-US" xlink:label="lab_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, Fiscal Year Maturity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationFiscalYearMaturityAbstract" xlink:label="loc_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B" xlink:to="lab_us-gaap_ContractualObligationFiscalYearMaturityAbstract_409872B8DF324A35A3CD5F1CF344C39B" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
    <link:label id="lab_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750_label_en-US" xlink:label="lab_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligation" xlink:label="loc_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750" xlink:to="lab_us-gaap_ContractualObligation_338690F0A71709B965A25F1CF3445750" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">July 1, 2020 - June 30, 2021</link:label>
    <link:label id="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F_label_en-US" xlink:label="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, to be Paid, Remainder of Fiscal Year</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear" xlink:label="loc_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F" xlink:to="lab_us-gaap_ContractualObligationFutureMinimumPaymentsDueRemainderOfFiscalYear_CD493E34DC33C5D77EE35F1CF344D87F" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">July 1, 2021 - June 30, 2023</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, to be Paid, Year Two and Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationDueInSecondAndThirdYear" xlink:label="loc_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D" xlink:to="lab_us-gaap_ContractualObligationDueInSecondAndThirdYear_1E37FC4169CFA0BA3E6C5F1CF344A82D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">July 1, 2023 - June 30, 2025</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, to be Paid, Year Four and Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationDueInFourthAndFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D" xlink:to="lab_us-gaap_ContractualObligationDueInFourthAndFifthYear_FA6FAD43E0E88EBBFA335F1CF345247D" xlink:type="arc" />
    <link:label id="lab_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA_totalLabel_en-US" xlink:label="lab_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">July 1, 2025 and beyond</link:label>
    <link:label id="lab_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA_label_en-US" xlink:label="lab_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contractual Obligation, to be Paid, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ContractualObligationDueAfterFifthYear" xlink:label="loc_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA" xlink:to="lab_us-gaap_ContractualObligationDueAfterFifthYear_08CCE8815CED262BFE405F1CF34570AA" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from lines of credit</link:label>
    <link:label id="lab_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007_label_en-US" xlink:label="lab_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Lines of Credit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007" xlink:to="lab_us-gaap_ProceedsFromLinesOfCredit_B444923AF43121D665985F1CF347F007" xlink:type="arc" />
    <link:label id="lab_us-gaap_EarningsPerShareAbstract_88D43CED2AB0F84DD38F5F1CF07CE7FC_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareAbstract_88D43CED2AB0F84DD38F5F1CF07CE7FC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareAbstract" xlink:label="loc_us-gaap_EarningsPerShareAbstract_88D43CED2AB0F84DD38F5F1CF07CE7FC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_F31CC50288F3A9F55F0A5F1CF07C40A4_terseLabel_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_F31CC50288F3A9F55F0A5F1CF07C40A4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">EARNINGS PER SHARE</link:label>
    <link:label id="lab_us-gaap_EarningsPerShareTextBlock_F31CC50288F3A9F55F0A5F1CF07C40A4_label_en-US" xlink:label="lab_us-gaap_EarningsPerShareTextBlock_F31CC50288F3A9F55F0A5F1CF07C40A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Earnings Per Share [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EarningsPerShareTextBlock" xlink:label="loc_us-gaap_EarningsPerShareTextBlock_F31CC50288F3A9F55F0A5F1CF07C40A4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_59EB48E17E1F62A21006A0D7938CFC31_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsTable_59EB48E17E1F62A21006A0D7938CFC31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Revenues from External Customers and Long-Lived Assets [Table]</link:label>
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    <link:label id="lab_otex_DefinedBenefitPlanEmployeeAgeGroupDomain_62DDAB7032DD839EBA67A70C687F7958_documentation_en-US" xlink:label="lab_otex_DefinedBenefitPlanEmployeeAgeGroupDomain_62DDAB7032DD839EBA67A70C687F7958" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Employee Age Group [Domain]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DefinedBenefitPlanEmployeeAgeGroupDomain" xlink:label="loc_otex_DefinedBenefitPlanEmployeeAgeGroupDomain_62DDAB7032DD839EBA67A70C687F7958" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_DefinedBenefitPlanEmployeeAgeGroupDomain_62DDAB7032DD839EBA67A70C687F7958" xlink:to="lab_otex_DefinedBenefitPlanEmployeeAgeGroupDomain_62DDAB7032DD839EBA67A70C687F7958" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 20</link:label>
    <link:label id="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60_label_en-US" xlink:label="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up to 20 [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up to 20 [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpto20Member" xlink:label="loc_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:to="lab_otex_EmployeeAgeUpto20Member_E96ACC0D5B62EAF1C221A70C6880AD60" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 25</link:label>
    <link:label id="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843_label_en-US" xlink:label="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up to 25 [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up to 25 [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpto25Member" xlink:label="loc_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:to="lab_otex_EmployeeAgeUpto25Member_6893E3E63A83FA6792F9A70C68803843" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 30</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C_label_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up To Thirty [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up To Thirty [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpToThirtyMember" xlink:label="loc_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:to="lab_otex_EmployeeAgeUpToThirtyMember_FA0EC303BE55180CB935A70C68807B2C" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 35</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A_label_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up To Thirty Five [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up To Thirty Five [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpToThirtyFiveMember" xlink:label="loc_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:to="lab_otex_EmployeeAgeUpToThirtyFiveMember_7E2242C214C39D804A80A70C6881037A" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 40</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579_label_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up To Forty [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up To Forty [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpToFortyMember" xlink:label="loc_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:to="lab_otex_EmployeeAgeUpToFortyMember_2444F63ED8C1C1DDA523A70C6881C579" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 45</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62_label_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up To Forty Five [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up To Forty Five[Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpToFortyFiveMember" xlink:label="loc_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:to="lab_otex_EmployeeAgeUpToFortyFiveMember_4E53BFFED4663A55E1D5A70C6881BF62" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">to age 50</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F_label_en-US" xlink:label="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Up To Fifty [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F_documentation_en-US" xlink:label="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Up To Fifty [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeUpToFiftyMember" xlink:label="loc_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:to="lab_otex_EmployeeAgeUpToFiftyMember_F0D2509A8B8AA2BEDE65A70C6881191F" xlink:type="arc" />
    <link:label id="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018_terseLabel_en-US" xlink:label="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">from age 51</link:label>
    <link:label id="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018_label_en-US" xlink:label="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Age Above Fifty One [Member]</link:label>
    <link:label id="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018_documentation_en-US" xlink:label="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Age Above Fifty One [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_EmployeeAgeAboveFiftyOneMember" xlink:label="loc_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:to="lab_otex_EmployeeAgeAboveFiftyOneMember_EA26B9DE1155B9093005A70C68818018" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Salary increases</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfCompensationIncrease_E21D3D0A7A145D63FB62A70C6882C09C" xlink:type="arc" />
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1_terseLabel_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension increases</link:label>
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1_label_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Pension Increase</link:label>
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1_documentation_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan Assumptions Used Calculating Benefit Obligation Rate Of Pension Increase</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease" xlink:label="loc_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:to="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRateOfPensionIncrease_C81FD0503D5CBC7525E6A70C6882BDC1" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Discount rate</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209" xlink:to="lab_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_164B3C170A562763FE93A70C68820209" xlink:type="arc" />
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F_terseLabel_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Normal retirement age</link:label>
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F_label_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Retirement Age</link:label>
    <link:label id="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F_documentation_en-US" xlink:label="lab_otex_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationRetirementAge_3F0CD7A9CA96BC37D1A7A70C68834C3F" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Retirement Age</link:label>
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    <link:label id="lab_otex_EmployeeFluctuationRate_D3B93610D2D5E7E54E64A70C6883C5FE_documentation_en-US" xlink:label="lab_otex_EmployeeFluctuationRate_D3B93610D2D5E7E54E64A70C6883C5FE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Employee Fluctuation Rate</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_187D16E21397F1819BA15F1CEF7020D1_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_187D16E21397F1819BA15F1CEF7020D1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2021</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_187D16E21397F1819BA15F1CEF7020D1_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_187D16E21397F1819BA15F1CEF7020D1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year One</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2022</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_5BF14AA1538CEC50597C5F1CEF706638" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_7896516CA7C5048907FC5F1CEF70AA15_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_7896516CA7C5048907FC5F1CEF70AA15" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2023</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_7896516CA7C5048907FC5F1CEF70AA15" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_7896516CA7C5048907FC5F1CEF70AA15" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_7896516CA7C5048907FC5F1CEF70AA15" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2024</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Expected Future Benefit Payment, Year Four</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0" xlink:to="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_E7115457D6A388BB44035F1CEF70C4D0" xlink:type="arc" />
    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_6A0450BFE1EAAE985C2E5F1CEF715B95_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_6A0450BFE1EAAE985C2E5F1CEF715B95" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2025</link:label>
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    <link:label id="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_7CA34EBB404047099A1E5F1CEF71899C_terseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_7CA34EBB404047099A1E5F1CEF71899C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2026 to 2030</link:label>
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    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerAbstract_D6788AA84372643E23A85F1CEEC2FC92_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerAbstract_D6788AA84372643E23A85F1CEEC2FC92" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer [Abstract]</link:label>
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    <link:label id="lab_otex_ROUAssetsAbandonmentMember_0C1FF4ACD007489EA0AA8220BB1CEA5F_terseLabel_en-US" xlink:label="lab_otex_ROUAssetsAbandonmentMember_0C1FF4ACD007489EA0AA8220BB1CEA5F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">ROU asset accelerated amortization</link:label>
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    <link:label id="lab_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20_label_en-US" xlink:label="lab_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer Support [Member]</link:label>
    <link:label id="lab_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20_documentation_en-US" xlink:label="lab_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Customer Support [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_CustomerSupportMember" xlink:label="loc_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20" xlink:to="lab_otex_CustomerSupportMember_4CBED25084718202C4F781FD1D57DE20" xlink:type="arc" />
    <link:label id="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944_terseLabel_en-US" xlink:label="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Professional service and other</link:label>
    <link:label id="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944_label_en-US" xlink:label="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Professional Service And Other [Member]</link:label>
    <link:label id="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944_documentation_en-US" xlink:label="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Professional Service And Other [Member]</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_ProfessionalServiceAndOtherMember" xlink:label="loc_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:to="lab_otex_ProfessionalServiceAndOtherMember_B6E3EE03010796D9677B81FD1D581944" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211_terseLabel_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenues (note 3):</link:label>
    <link:label id="lab_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211_label_en-US" xlink:label="lab_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenues [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenuesAbstract" xlink:label="loc_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211" xlink:to="lab_us-gaap_RevenuesAbstract_AAA327CEFF5733E1CEB681FD1D58A211" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07_terseLabel_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total revenues</link:label>
    <link:label id="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07_label_en-US" xlink:label="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue from Contract with Customer, Excluding Assessed Tax</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07" xlink:to="lab_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_E2516D583528EE9566C481FD1D58AE07" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of revenues:</link:label>
    <link:label id="lab_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50_label_en-US" xlink:label="lab_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Revenue [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfRevenueAbstract" xlink:label="loc_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50" xlink:to="lab_us-gaap_CostOfRevenueAbstract_925504F68E4D6D97E10181FD1D595E50" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Costs of revenues</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Goods and Service, Excluding Depreciation, Depletion, and Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF" xlink:to="lab_us-gaap_CostOfGoodsAndServiceExcludingDepreciationDepletionAndAmortization_3C730141D008944319DE81FD1D59EEEF" xlink:type="arc" />
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B_terseLabel_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of acquired technology-based intangible assets (note 8)</link:label>
    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B" xlink:to="lab_us-gaap_AmortizationOfIntangibleAssets_1A2810F57384B44C7D9881FD1D59974B" xlink:type="arc" />
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337_totalLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total cost of revenues</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Goods and Services Sold</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337" xlink:to="lab_us-gaap_CostOfGoodsAndServicesSold_BF4DDDB0CDCB23C6C68F81FD1D590337" xlink:type="arc" />
    <link:label id="lab_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A_totalLabel_en-US" xlink:label="lab_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Gross profit</link:label>
    <link:label id="lab_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A_label_en-US" xlink:label="lab_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gross Profit</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A" xlink:to="lab_us-gaap_GrossProfit_5453D18C1BD5996C814681FD1D5ADE8A" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating expenses:</link:label>
    <link:label id="lab_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6_label_en-US" xlink:label="lab_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Expenses [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingExpensesAbstract" xlink:label="loc_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6" xlink:to="lab_us-gaap_OperatingExpensesAbstract_667ECD5D319ED6DDE6FD81FD1D5A14F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2_terseLabel_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Research and development</link:label>
    <link:label id="lab_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2_label_en-US" xlink:label="lab_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Research and Development Expense (Excluding Acquired in Process Cost)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2" xlink:to="lab_us-gaap_ResearchAndDevelopmentExpenseExcludingAcquiredInProcessCost_A27D42BA45459A532B2D81FD1D5A0FE2" xlink:type="arc" />
    <link:label id="lab_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3_terseLabel_en-US" xlink:label="lab_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Sales and marketing</link:label>
    <link:label id="lab_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3_label_en-US" xlink:label="lab_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling and Marketing Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SellingAndMarketingExpense" xlink:label="loc_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3" xlink:to="lab_us-gaap_SellingAndMarketingExpense_5516DAF98CCEA77C7E3981FD1D5B85B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2_terseLabel_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">General and administrative</link:label>
    <link:label id="lab_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2_label_en-US" xlink:label="lab_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">General and Administrative Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2" xlink:to="lab_us-gaap_GeneralAndAdministrativeExpense_B6C0EA39AB0E45EDCD5381FD1D5BBBF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86_terseLabel_en-US" xlink:label="lab_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Depreciation</link:label>
    <link:label id="lab_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86_label_en-US" xlink:label="lab_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Nonproduction</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DepreciationNonproduction" xlink:label="loc_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86" xlink:to="lab_us-gaap_DepreciationNonproduction_6A43309CC7C4C4A583DE81FD1D5B0B86" xlink:type="arc" />
    <link:label id="lab_otex_AmortizationOfOtherIntangibleAssets_6580B32EE01A7C8A3AC381FD1D5BC79B_terseLabel_en-US" xlink:label="lab_otex_AmortizationOfOtherIntangibleAssets_6580B32EE01A7C8A3AC381FD1D5BC79B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Amortization of acquired customer-based intangible assets (note 8)</link:label>
    <link:label id="lab_otex_AmortizationOfOtherIntangibleAssets_6580B32EE01A7C8A3AC381FD1D5BC79B_label_en-US" xlink:label="lab_otex_AmortizationOfOtherIntangibleAssets_6580B32EE01A7C8A3AC381FD1D5BC79B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization Of Other Intangible Assets</link:label>
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    <link:label id="lab_otex_GainLossfromLongtermOtherReceivable_74E7C97D173414F43A5FA70C65014DBD_terseLabel_en-US" xlink:label="lab_otex_GainLossfromLongtermOtherReceivable_74E7C97D173414F43A5FA70C65014DBD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income from long-term other receivable</link:label>
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    <link:label id="lab_us-gaap_PensionExpense_27D6471F02B9B1BF7AF4BF8560E60916_terseLabel_en-US" xlink:label="lab_us-gaap_PensionExpense_27D6471F02B9B1BF7AF4BF8560E60916" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension expense</link:label>
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    <link:label id="lab_us-gaap_AmortizationOfFinancingCosts_173C40CC4977F611D2FDBF8560E682FB_label_en-US" xlink:label="lab_us-gaap_AmortizationOfFinancingCosts_173C40CC4977F611D2FDBF8560E682FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_173C40CC4977F611D2FDBF8560E682FB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherAmortizationOfDeferredCharges_625D54E6441EBE70DA8CBF8560E63E9C_label_en-US" xlink:label="lab_us-gaap_OtherAmortizationOfDeferredCharges_625D54E6441EBE70DA8CBF8560E63E9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Other Deferred Charges</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OtherAmortizationOfDeferredCharges" xlink:label="loc_us-gaap_OtherAmortizationOfDeferredCharges_625D54E6441EBE70DA8CBF8560E63E9C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAmortizationOfDeferredCharges_625D54E6441EBE70DA8CBF8560E63E9C" xlink:to="lab_us-gaap_OtherAmortizationOfDeferredCharges_625D54E6441EBE70DA8CBF8560E63E9C" xlink:type="arc" />
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_5D7DC1BF5D969C89ABE1BF8560E6F86C_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_5D7DC1BF5D969C89ABE1BF8560E6F86C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accelerated amortization of right of use assets (note 18)</link:label>
    <link:label id="lab_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_5D7DC1BF5D969C89ABE1BF8560E6F86C_label_en-US" xlink:label="lab_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_5D7DC1BF5D969C89ABE1BF8560E6F86C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Lease, Right-of-Use Asset, Amortization Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_5D7DC1BF5D969C89ABE1BF8560E6F86C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Loss on sale and write down of property and equipment</link:label>
    <link:label id="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24_label_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Gain (Loss) on Disposition of Property Plant Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24" xlink:to="lab_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_2ECEF28B8E6BC8E0C185BF8560E73D24" xlink:type="arc" />
    <link:label id="lab_us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments_006DF0B3BA70C8DC078ABF8560E77059_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments_006DF0B3BA70C8DC078ABF8560E77059" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Release of unrealized gain on marketable securities to income</link:label>
    <link:label id="lab_us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments_006DF0B3BA70C8DC078ABF8560E77059_label_en-US" xlink:label="lab_us-gaap_MarketableSecuritiesGainLossExcludingOtherThanTemporaryImpairments_006DF0B3BA70C8DC078ABF8560E77059" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Marketable Securities, Gain (Loss), Excluding Other-than-temporary Impairment Loss</link:label>
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    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_796F557A69F2D7DEEB40BF8560E77FEC_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_796F557A69F2D7DEEB40BF8560E77FEC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred taxes</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_796F557A69F2D7DEEB40BF8560E77FEC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncomeLossFromEquityMethodInvestments_FC116C4D2FE6AD495ABFBF8560E81F3C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_IncomeLossFromEquityMethodInvestments_FC116C4D2FE6AD495ABFBF8560E81F3C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Share in net (income) loss of equity investees</link:label>
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from long-term debt and Revolver</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E" xlink:to="lab_us-gaap_ProceedsFromIssuanceOfLongTermDebt_389AFFFDEEC8C8E67B4FBF8560EC227E" xlink:type="arc" />
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8_negatedLabel_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Repayment of long-term debt and Revolver</link:label>
    <link:label id="lab_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8_label_en-US" xlink:label="lab_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Repayments of Long-term Debt</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8" xlink:to="lab_us-gaap_RepaymentsOfLongTermDebt_FEB0DC2278561B6723B7BF8560ECF9B8" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Debt extinguishment costs (note 23)</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payment for Debt Extinguishment or Debt Prepayment Cost</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDebtExtinguishmentCosts" xlink:label="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4" xlink:to="lab_us-gaap_PaymentsOfDebtExtinguishmentCosts_C013C091DEA8AF110093BF8560EC20A4" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Debt issuance costs</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Debt Issuance Costs</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDebtIssuanceCosts" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D" xlink:to="lab_us-gaap_PaymentsOfDebtIssuanceCosts_9000E038CB8A1A26827CBF8560ECC48D" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_CB3FD28DF3C1978F7BE2BF8560ED2384_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForRepurchaseOfCommonStock_CB3FD28DF3C1978F7BE2BF8560ED2384" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Purchase of Treasury Stock</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_CB3FD28DF3C1978F7BE2BF8560ED2384" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchase of non-controlling interests</link:label>
    <link:label id="lab_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD_label_en-US" xlink:label="lab_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Noncontrolling Interests</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsToMinorityShareholders" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD" xlink:to="lab_us-gaap_PaymentsToMinorityShareholders_158AD0CCA35D84FF9A9ABF8560ED7EAD" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsOfDividends_611BAE8F8D3B04ECC854BF8560EDAA0A_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividends_611BAE8F8D3B04ECC854BF8560EDAA0A" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments of dividends to shareholders</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_PaymentsOfDividends" xlink:label="loc_us-gaap_PaymentsOfDividends_611BAE8F8D3B04ECC854BF8560EDAA0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsOfDividends_611BAE8F8D3B04ECC854BF8560EDAA0A" xlink:to="lab_us-gaap_PaymentsOfDividends_611BAE8F8D3B04ECC854BF8560EDAA0A" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by (used in) financing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Financing Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378" xlink:to="lab_us-gaap_NetCashProvidedByUsedInFinancingActivities_B52431C331206D408BADBF8560EDC378" xlink:type="arc" />
    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150_terseLabel_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Foreign exchange gain (loss) on cash held in foreign currencies</link:label>
    <link:label id="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150_label_en-US" xlink:label="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150" xlink:to="lab_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_E6BC5131CE9B1D08FC93BF8560ED5150" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5_totalLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Increase (decrease) in cash, cash equivalents and restricted cash during the period</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_7808592C30A4415270ECBF8560EECCE5" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9_periodStartLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Cash, cash equivalents and restricted cash at beginning of the period</link:label>
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9_label_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_82F197F6A67D3DEFD27BBF8560EEE7C9" xlink:type="arc" />
    <link:label id="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0C24BFBF380F9A99C8D3BF8560EEC01B_periodEndLabel_en-US" xlink:label="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0C24BFBF380F9A99C8D3BF8560EEC01B" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Cash, cash equivalents and restricted cash at end of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0C24BFBF380F9A99C8D3BF8560EEC01B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0C24BFBF380F9A99C8D3BF8560EEC01B" xlink:to="lab_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0C24BFBF380F9A99C8D3BF8560EEC01B" xlink:type="arc" />
    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_2B588B8B081959929FDEBF8560EE0334_verboseLabel_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_2B588B8B081959929FDEBF8560EE0334" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Reconciliation of cash, cash equivalents and restricted cash:</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="loc_us-gaap_SupplementalCashFlowInformationAbstract_2B588B8B081959929FDEBF8560EE0334" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_0DBF06116830524E1D6ABF8560EEBC94_verboseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_0DBF06116830524E1D6ABF8560EEBC94" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_0DBF06116830524E1D6ABF8560EEBC94" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RestrictedCash_DD714134F020CFE05E01BF8560EF92B5_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedCash_DD714134F020CFE05E01BF8560EF92B5" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted cash</link:label>
    <link:label id="lab_us-gaap_RestrictedCash_DD714134F020CFE05E01BF8560EF92B5_label_en-US" xlink:label="lab_us-gaap_RestrictedCash_DD714134F020CFE05E01BF8560EF92B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Restricted Cash</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_RestrictedCash" xlink:label="loc_us-gaap_RestrictedCash_DD714134F020CFE05E01BF8560EF92B5" xlink:type="locator" />
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    <link:label id="lab_otex_DebtInstrumentConvertibleConversionRate_EBE75E9D7D806B68C0535F1CEC50F7B1_documentation_en-US" xlink:label="lab_otex_DebtInstrumentConvertibleConversionRate_EBE75E9D7D806B68C0535F1CEC50F7B1" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Convertible, Conversion Rate</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DebtInstrumentConvertibleConversionRate" xlink:label="loc_otex_DebtInstrumentConvertibleConversionRate_EBE75E9D7D806B68C0535F1CEC50F7B1" xlink:type="locator" />
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    <link:label id="lab_otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal_CFA719CE4D17556520335F1CEC5110BE_terseLabel_en-US" xlink:label="lab_otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal_CFA719CE4D17556520335F1CEC5110BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Total converted per $1,000 Principal</link:label>
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    <link:label id="lab_otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal_CFA719CE4D17556520335F1CEC5110BE_documentation_en-US" xlink:label="lab_otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal_CFA719CE4D17556520335F1CEC5110BE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Convertible, If-converted Value per Thousand Dollars of Principal</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal" xlink:label="loc_otex_DebtInstrumentConvertibleIfconvertedValueperThousandDollarsofPrincipal_CFA719CE4D17556520335F1CEC5110BE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_C93D5E62B3E052B153D45F1CEC5147AF_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt_C93D5E62B3E052B153D45F1CEC5147AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from issuance of debt</link:label>
    <link:label id="lab_us-gaap_ProceedsFromIssuanceOfDebt_C93D5E62B3E052B153D45F1CEC5147AF_label_en-US" xlink:label="lab_us-gaap_ProceedsFromIssuanceOfDebt_C93D5E62B3E052B153D45F1CEC5147AF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Issuance of Debt</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentTerm_449037DD75A1DF5D1C885F1CEC511776_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm_449037DD75A1DF5D1C885F1CEC511776" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term loan period</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTerm_449037DD75A1DF5D1C885F1CEC511776_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTerm_449037DD75A1DF5D1C885F1CEC511776" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Term</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentTerm" xlink:label="loc_us-gaap_DebtInstrumentTerm_449037DD75A1DF5D1C885F1CEC511776" xlink:type="locator" />
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    <link:label id="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4_terseLabel_en-US" xlink:label="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Term loan quarterly repayment as percentage of principal</link:label>
    <link:label id="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4_label_en-US" xlink:label="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Periodic Payment, Quarterly Repayment Percentage of Principal</link:label>
    <link:label id="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4_documentation_en-US" xlink:label="lab_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Periodic Payment, Quarterly Repayment Percentage of Principal</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal" xlink:label="loc_otex_DebtInstrumentPeriodicPaymentQuarterlyRepaymentPercentageofPrincipal_3C158D2EE3302C7A0EC75F1CEC528EF4" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_E54E93108B8649B39C135F1CEC52682D_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_E54E93108B8649B39C135F1CEC52682D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Interest addition to floating rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_E54E93108B8649B39C135F1CEC52682D_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_E54E93108B8649B39C135F1CEC52682D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_E54E93108B8649B39C135F1CEC52682D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_DFCB9D8B138FEFBB749E5F1CEC52BD69_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_DFCB9D8B138FEFBB749E5F1CEC52BD69" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Effective interest rate percentage</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_DFCB9D8B138FEFBB749E5F1CEC52BD69_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_DFCB9D8B138FEFBB749E5F1CEC52BD69" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_DFCB9D8B138FEFBB749E5F1CEC52BD69" xlink:type="locator" />
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    <link:label id="lab_otex_DebtInstrumentCovenantLeverageRatioMaximum_67F1D08AECF64C99C42A5F1CEC52449E_terseLabel_en-US" xlink:label="lab_otex_DebtInstrumentCovenantLeverageRatioMaximum_67F1D08AECF64C99C42A5F1CEC52449E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leverage ratio, compliance maximum</link:label>
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    <link:label id="lab_otex_DebtInstrumentCovenantLeverageRatioMaximum_67F1D08AECF64C99C42A5F1CEC52449E_documentation_en-US" xlink:label="lab_otex_DebtInstrumentCovenantLeverageRatioMaximum_67F1D08AECF64C99C42A5F1CEC52449E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Covenant, Leverage Ratio, Maximum</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DebtInstrumentCovenantLeverageRatioMaximum" xlink:label="loc_otex_DebtInstrumentCovenantLeverageRatioMaximum_67F1D08AECF64C99C42A5F1CEC52449E" xlink:type="locator" />
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    <link:label id="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0_terseLabel_en-US" xlink:label="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leverage ratio</link:label>
    <link:label id="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0_label_en-US" xlink:label="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Leverage Ratio</link:label>
    <link:label id="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0_documentation_en-US" xlink:label="lab_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Debt Instrument, Leverage Ratio</link:label>
    <link:loc xlink:href="otex-20200630.xsd#otex_DebtInstrumentLeverageRatio" xlink:label="loc_otex_DebtInstrumentLeverageRatio_A2FDAFC9C3108295C6485F1CEC526DA0" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_2B1C79A7D44F45CFE2F85F1CEC533A0A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShortTermLeaseCost_2EA2A4D5086F4D37AF2381FD673B5808_label_en-US" xlink:label="lab_us-gaap_ShortTermLeaseCost_2EA2A4D5086F4D37AF2381FD673B5808" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-term Lease, Cost</link:label>
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    <link:label id="lab_us-gaap_VariableLeaseCost_9D74B34D946C91442B1581FD673BC555_label_en-US" xlink:label="lab_us-gaap_VariableLeaseCost_9D74B34D946C91442B1581FD673BC555" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Lease, Cost</link:label>
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    <link:label id="lab_us-gaap_SubleaseIncome_9B49F6385ED7623C716281FD673BF8C5_label_en-US" xlink:label="lab_us-gaap_SubleaseIncome_9B49F6385ED7623C716281FD673BF8C5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Sublease Income</link:label>
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    <link:label id="lab_us-gaap_LeaseCost_EA1AD74847058EF94C2381FD673B282E_totalLabel_en-US" xlink:label="lab_us-gaap_LeaseCost_EA1AD74847058EF94C2381FD673B282E" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total lease cost</link:label>
    <link:label id="lab_us-gaap_LeaseCost_EA1AD74847058EF94C2381FD673B282E_label_en-US" xlink:label="lab_us-gaap_LeaseCost_EA1AD74847058EF94C2381FD673B282E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease, Cost</link:label>
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    <link:label id="lab_otex_CloudRevenuesAndCustomerSupportRevenuesMember_83B14ED6C5D2224E43265F1CF21BBE47_terseLabel_en-US" xlink:label="lab_otex_CloudRevenuesAndCustomerSupportRevenuesMember_83B14ED6C5D2224E43265F1CF21BBE47" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recurring revenue</link:label>
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