When testing the Front End Server configuration and asking the Wizard to test Automatic Logon you may find you get the following error:
Failed to send SIP request: No connection could be made because the target machine actively refused it
Confusing. What you will find though is the IP address it points to for the SIP port (5061) is a Domain Controller with DNS. This is your first clue.. And is also caused because we wanted to test auto logon configuration.
Follow this TechNet article to create the relevant SIPInternalTLS SRV record in ADDNS.
At this stage you will find it still doesn't work, and that's because the Test Users you selected must be enabled for OCS. This is performed in ADUC. You will also need to install the OCS Administrative Tools to have this functionality.
Once the Users are enabled via ADUC re-run the Test. You will now find the Test is a success:
MVP - Exchange Server
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