The Communications Server 2007 R2 Response Group Service does not update its list of trusted hosts at run time

The Microsoft Office Communications Server 2007 R2 Response Group Service does not update its list of trusted hosts at run time. Connections from the new front-end server erver are refused by the old front-end servers, and calls are disconnected.

To resolve this issue, apply the following updates:

• 967830  (http://support.microsoft.com/kb/967830/ ) Description of the update package for Office Communications Server 2007 R2, Web Components: March 2009
• 967829  (http://support.microsoft.com/kb/967829/ ) Description of the update package for Office Communications Server 2007 R2, Response Group Service: March 2009
• 968280  (http://support.microsoft.com/kb/968280/ ) Description of the update package for Office Communications Server 2007 R2, Administration Tools: March 2009

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.