The Lync Server product team has completed testing of Lync Server 2010 and SQL Server 2008 R2. The product now fully supports SQL Server 2008 R2 on all Lync Server monitoring, archiving, and front-end server databases. At this time, SQL Server 2008 R2 is not supported for group chat databases.

The Lync Server 2010 Supportability Guide and other relevant content in the Lync Server Technical Library will be updated shortly to align to our updated supportability stance.