Delegation relationship is broken after a delegate signs in to Lync for Mac 2011

When this issue occurs, the delegate cannot schedule a meeting on behalf of the manager. If the delegate then signs in to Microsoft Lync 2010 or Lync 2013, he will receive a notification that indicates that the delegate is removed. 


To resolve this issue, install the following update:
3007876 October 2014 update for Lync for Mac 2011 14.0.10 (KB3007876)

More Information

This issue occurs because Lync for Mac 2011 automatically acknowledges an entry for delegate. Then, the entry is removed in the PromptedSubscriber table in SQL.