This article describes the supportability for the Microsoft Office Communications Server 2007 R2 member server role on a server that has a Windows Server 2008 R2 operating system installed.

NOTE : However, the following scenarios are currently not supported on a Windows Server 2008 R2 operating system:

• Office Communications Server 2007 R2, Group Chat will not function in a Windows 2008 R2 forest or when Group Chat member servers are joined to a Windows 2008 R2 domain. We know of an issue with changes in Windows 2008 R2 that requires a Group Chat Client and Group Chat Admin Tools hotfix. The Group Chat Client and Group Chat Admin Tools hotfixes are currently scheduled for mid-April 2010.
• Deploying Office Communications Server 2007 R2, Group Chat on the Windows 2008 R2 operating system is currently not supported.
• Upgrading the operating system to Windows Server 2008 R2 for an existing installation of Office Communications Server 2007 R2 is not supported.
• Office Communications Server 2007 R2 administration tools will only install in native 32-bit or native 64-bit mode. Because of an application compatibility issue with Windows Server 2008 R2, installing 32-bit Office Communications Server 2007 R2 administration tools on 64-bit Windows 2008 R2 operating system is not supported.
• Deploying Speech Server 2007 on Windows Server 2008 R2 is not supported.