I just noticed the other day that our calendaring for CUPC status is not working anymore. It used to show "in a meeting" when exchange showed calendar as busy, but I feel like it broke after we upgraded to CM 7.1.3. When running the Presence Troubleshooter the only error I get back is:
|Verify Cisco Unified Communications Manager publisher version||The Cisco Unified Communications Manager publisher version has changed||Please use the Serviceability application to restart the Sync Agent (fix)|
Could this be the cause of the exchange calendaring not working? Seems unlikely...