There were some updates released yesterday for Microsoft OCS 2007 R2.
I haven’t had a chance to look at them in detail, but they all look mostly related to the Group Chat functionality:
Group Chat Server (KB 2728998): http://support.microsoft.com/kb/2728998
Group Chat Administration Tool (KB 2728997): http://support.microsoft.com/kb/2728997
Group Chat Client (KB 2735021): http://support.microsoft.com/kb/2735021
These updates bring the build number up to [...]