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  <xs:element id="evcm_BrighterVisionMember" abstract="true" name="BrighterVisionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_SeriesCConvertiblePreferredStockMember" abstract="true" name="SeriesCConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_ScheduleOfCapitalizedSoftwareTableTextBlock" abstract="false" name="ScheduleOfCapitalizedSoftwareTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="evcm_CapitalizedComputerSoftwareCapitalizedFeaturesNotExpectedToBeUsed" abstract="false" name="CapitalizedComputerSoftwareCapitalizedFeaturesNotExpectedToBeUsed" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_RestrictedStockUnitsTimeVestingMember" abstract="true" name="RestrictedStockUnitsTimeVestingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" abstract="true" name="CashPaidForAmountsIncludedInTheMeasurementOfLeaseLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="evcm_InvoiceSimpleMember" abstract="true" name="InvoiceSimpleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_NumberOfCoreVerticals" abstract="false" name="NumberOfCoreVerticals" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="evcm_DebtInstrumentPeriodicPaymentTermsPercentageOfOriginalPrincipalBalance" abstract="false" name="DebtInstrumentPeriodicPaymentTermsPercentageOfOriginalPrincipalBalance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="evcm_AlertMDMember" abstract="true" name="AlertMDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsMinimumInitialPublicOfferingPricePerShare" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingRightsMinimumInitialPublicOfferingPricePerShare" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="evcm_NewTermLoanMember" abstract="true" name="NewTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedLiabilitiesAndOther" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccruedLiabilitiesAndOther" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_BusinessAcquisitionProFormaAdjustmentsToNetIncomeLoss" abstract="false" name="BusinessAcquisitionProFormaAdjustmentsToNetIncomeLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_StockIssuedDuringPeriodValuePreferredPlacement" abstract="false" name="StockIssuedDuringPeriodValuePreferredPlacement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_NewRevolverMember" abstract="true" name="NewRevolverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_ValuationAllowanceIncreaseDecreaseInIncomeTaxExpenseIfDeferredTaxAssetsRealized" abstract="false" name="ValuationAllowanceIncreaseDecreaseInIncomeTaxExpenseIfDeferredTaxAssetsRealized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_AmortizationOfDeferredFinancingCostsAndNonCashInterest" abstract="false" name="AmortizationOfDeferredFinancingCostsAndNonCashInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsContractAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsContractAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_SharesAuthorizedCommonAndPreferredStock" abstract="false" name="SharesAuthorizedCommonAndPreferredStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="evcm_EffectiveIncomeTaxRateReconciliationIntellectualPropertyMigrationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationIntellectualPropertyMigrationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="evcm_EurocurrencyMember" abstract="true" name="EurocurrencyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_SubordinatedUnsecuredPromissoryNoteServiceNationIncMember" abstract="true" name="SubordinatedUnsecuredPromissoryNoteServiceNationIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_EmployeeStockPurchasePlan2021Member" abstract="true" name="EmployeeStockPurchasePlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_PaymentOfStockIssuanceCostsInitialPublicOfferingRelatedFees" abstract="false" name="PaymentOfStockIssuanceCostsInitialPublicOfferingRelatedFees" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_BusinessCombinationConsiderationTransferredFairValueOfEarnout" abstract="false" name="BusinessCombinationConsiderationTransferredFairValueOfEarnout" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_RestrictedStockAwardsFundingMember" abstract="true" name="RestrictedStockAwardsFundingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_ShareBasedPaymentArrangementMarketConditionBasedOptionMember" abstract="true" name="ShareBasedPaymentArrangementMarketConditionBasedOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_MarketingTechnologySolutionsMember" abstract="true" name="MarketingTechnologySolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_NumberOfCustomers" abstract="false" name="NumberOfCustomers" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="evcm_Acquisitions2020Member" abstract="true" name="Acquisitions2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_IncentiveAwardPlan2021Member" abstract="true" name="IncentiveAwardPlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_DrChronoIncMember" abstract="true" name="DrChronoIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_UpdoxMember" abstract="true" name="UpdoxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_StockIssuedDuringPeriodSharesPreferredPlacement" abstract="false" name="StockIssuedDuringPeriodSharesPreferredPlacement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="evcm_OtherAcquisitionsMember" abstract="true" name="OtherAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_BaseRateOrLondonInterbankOfferedRateLIBORMember" abstract="true" name="BaseRateOrLondonInterbankOfferedRateLIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_LongTermDebtIncludingFuturePaidInKindInterest" abstract="false" name="LongTermDebtIncludingFuturePaidInKindInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_RemodelingMember" abstract="true" name="RemodelingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_RightOfUseAssetsObtainedInExchangeForNewLeaseObligationsAbstract" abstract="true" name="RightOfUseAssetsObtainedInExchangeForNewLeaseObligationsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="evcm_SeriesAConvertiblePreferredStockMember" abstract="true" name="SeriesAConvertiblePreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_MyPTHubMember" abstract="true" name="MyPTHubMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_TemporaryEquityStockIssuedIssuanceCosts" abstract="false" name="TemporaryEquityStockIssuedIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_TemporaryEquitySharesConversionOfConvertibleSecurities" abstract="false" name="TemporaryEquitySharesConversionOfConvertibleSecurities" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="evcm_TimelyLTDMember" abstract="true" name="TimelyLTDMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_StockRepurchaseProgramAdditionalAuthorizedAmount" abstract="false" name="StockRepurchaseProgramAdditionalAuthorizedAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_ShareBasedPaymentArrangementTimeBasedOptionMember" abstract="true" name="ShareBasedPaymentArrangementTimeBasedOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerDeposit" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerDeposit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_NewCreditAgreementMember" abstract="true" name="NewCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_ServiceFusionMember" abstract="true" name="ServiceFusionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_BusinessAcquisitionProFormaNetIncomeLossAttributableToCommonStockholders" abstract="false" name="BusinessAcquisitionProFormaNetIncomeLossAttributableToCommonStockholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_BusinessCombinationContingentConsiderationTotalRevenueTarget" abstract="false" name="BusinessCombinationContingentConsiderationTotalRevenueTarget" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_QiigoMember" abstract="true" name="QiigoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_MDTechMember" abstract="true" name="MDTechMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="evcm_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredRevenue" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredRevenue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="evcm_LongTermDebtPercentageBearingVariableInterestBasisSpreadOnPercentageRate" abstract="false" name="LongTermDebtPercentageBearingVariableInterestBasisSpreadOnPercentageRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="evcm_ShareBasedPaymentArrangementPerformanceBasedOptionMember" abstract="true" name="ShareBasedPaymentArrangementPerformanceBasedOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
