A request that is sent to a Live Communications Server 2005 access proxy array is rejected

When a request is sent to an access proxy server that is part of a Microsoft Office Live Communications Server 2005 access proxy array, the request is rejected.

When you view the flat-file log on Live Communications Server, you may see one or both of the following messages. These messages indicate that an error occurred:

This problem may occur when the access proxy server does not process any Live Communications Server network traffic for three to four hours. When a request is sent to the access proxy server, the access proxy server returns the following SIP response code to the computer that sent the request:

How to obtain the hotfix

This issue is fixed in the Live Communications Server 2005 post-Service Pack 1 Hotfix Package that is dated July 21, 2006. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

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