How to do it...

  1. To be able to integrate, the Unified Communications Managed API 4.0 Runtime needs to be installed on the Exchange server(s). We can validate that this has been installed by running the cmdlet:
      Get-ItemProperty "HKLM:\SYSTEM\CurrentControlSet\Services\MSExchange ` OWA\InstantMessaging" -Name ImplementationDLLPath 
  1. Retrieve the certificate thumbprint that is used in the Exchange server for web services:
      Get-ExchangeCertificate 
  1. The output will look similar to what is shown in the following screenshot. Save the thumbprint from the certificate assigned for the web service from the output.
  1. Create an override setting for ...

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