Today I found a Warning that was filling my Lync 2010 Front End event Log. Event ID 31196 every 2 minutes
Collaboration platform has failed to provision the data.
Collaboration platform has failed to provision the data because of the following exception:
Exception: Microsoft.Rtc.Collaboration.ProvisioningFailureException:Cannot read contacts from Active Directory: Active Directory server “adbdc01.mydomain.co.nz” is not available. Try again later.
Restart the Lync Response Group Service…