Symptom ======== Lync GroupChat 2010 (UCMA Application) does not work, even after successful installation with EventID 5286. Cause ===== During installation if the Application Pool Name box is empty, you can specify an application pool name. This is an FQDN and must match the...

Symptom: GroupChat Server is not syncing in changes to Chat Room membership, via Distribution List Cause: This issue could happen, if the changes to the Distribution list are not completely synced in from the DC. In certain scenarios, we have a number of ports on the GroupChat Server in TIME_WAIT...

I had questions from engineers and customers around a good start for GroupChat Deep-Dive. http://technet.microsoft.com/en-us/library/ee303783(office.13).aspx This is a very recent addition, which gives a good Overview. Group Chat Call Flows are outlined and explained here: http...