Blog de Augusto Simoes (MVP)

Support Windows 2008 R2

Group Chat

• 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 Operating System

• 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.

Speech Server

• Development with Speech Server (2007) Developer Edition and deployment of the Speech Server 2007 role are not supported on Windows Server 2008 R2

6. Install updates for Office Communications Server 2007 R2 that are dated October 2009 (3.5.6907.56), or install later versions. To download the updates for Office Communications Server 2007 R2, visit the following Microsoft Web site: Microsoft Office Communications Server 2007 R2 Hotfix KB 968802 (http://www.microsoft.com/downloads/details.aspx?displaylang=en&FamilyID=b3b02475-150c-41fa-844a-c10a517040f4)

7. The default security setting on Windows Server 2008 R2 operating system for NTLM SSP requires 128-bit encryption. Depending on the client operating system mix in the enterprise, you may have to reduce this setting on a Windows Server 2008 R2 operating system that is running Office Communications Server 2007 R2 as a down level operating system. The key is set to "No requirement."

a. For any down level operating system, such as Windows XP or for Windows Vista, the default value is set to "No Minimum."

b. For a Windows 7 operating system, the default value is set to "Requires 128-bit encryption."

If you want to change the NTLM setting, follow these steps:

1. Start secpol.msc on a Windows Server 2008 R2 operating system server.

2. Click to select Local Policies and then click Security Options node.

3. Make sure that the following values of the policies are set to "No Minimum."

• Network Security: Minimum session security for NTLM SSP based (including secure RPC)
• Network Security: Minimum session security for NTLM SSP based (including secure RPC) servers