This one has kept me running for quite some time:
In the On-Premise Lync Installation of a Client (Lync 2010) I have the problem that neither the "incoming call" toast nor the call window when established will resolve outlook contacts of the users.
Funny thing is - Outlook contacts are searchable from the Lync Client and show up with their numbers. I can call them using this method and their name gets carried over into the call window.
And another very strange thing: Whenever the call passes through a response group first some colleagues have reported they were shown the name of the caller (themselves from their cell)
Additional fact: numbers are displayed in E.164 format in the toast and call windows, i parsed through ucapi logs and traces without finding anything useful. Any suggestions on this?