As customers were beginning to upgrade OCS 2007 R2 deployments with Lync, the question of support for Group Chat showed that what was originally thought to be a simple answer required a more complex matrix to illustrate.

After conferring with the appropriate teams, this is the verbiage and table we submitted for inclusion in the document refresh.

August 2 - Technet now contains this information and as such is considered the authoritative information. Any conflict or confusion please alert me so I can rectify. http://technet.microsoft.com/en-us/library/gg615442.aspx

Supported Client and Server Coexistence

Customers migrating from Office Communications Server 2007 R2 to Microsoft Lync Server 2010 along with Group Chat can coexist under specific combinations of Server versions and Client versions. The following table summarizes the multiple combinations indicating support or not. We do not support the 2010 clients connecting to an R2 server.

           \     Servers

                \

Clients      \

OCS 2007 R2 / Group Chat Server R2

OCS 2007 R2 / Group Chat Server 2010

Lync Server 2010 / Group Chat Server R2

Lync Server 2010 /

Group Chat Server 2010

Communicator 2007 R2 / Group Chat Client 2007 R2

YES

YES

YES

YES

Communicator 2007 R2 / Group Chat Client 2010

NO

NO

NO

YES

Lync 2010 / Group Chat 2007 R2

NO

NO

YES

YES

Lync 2010 / Group Chat 2010

NO

NO

NO

YES

 

TomL GCKid