Article ID: 972700 - View products that this article applies to.
When Microsoft Office Communications Server 2007 R2 routes a voice mail call to a Microsoft Exchange Server 2007 Unified Messaging server, there is no indication in the corresponding invitation message that the request originated from Office Communications Server. However, the Exchange Server 2007 Unified Messaging server may require this information to perform additional processing for requests that originated from Office Communications Server.
To resolve this issue, apply the following update:
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/969821/ )Description of the update package for Office Communications Server 2007 R2: July, 2009