Article ID: 968877 - View products that this article applies to.
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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:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 968877 - Last Review: January 15, 2015 - Revision: 1.1