Article ID: 973316
This article applies to the following product:
You use Group Policy to set the connection information for a Microsoft Office Communications Server 2007 R2 Group Chat client. Then, when you try to make the connection in the Group Chat client for the first time, the connection fails. Additionally, you receive the following error message:
After you exit the Group Chat client and then restart it, the connection succeeds.
The domain_name domain is not available
This problem occurs because the Group Chat client ignores the value of the following registry key when you run the client for the first time:
After you restart the client, the value of this registry key is saved to the local preferences, and the Group Chat client then uses the value from that location correctly. Therefore, later connection attempts succeed.
To resolve this problem, apply the following update:
(http://support.microsoft.com/kb/969818/ )Description of the update for Office Communications Server 2007 R2, Group Chat Client: July 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.