Article ID: 2254191 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the update that is described in KB article 978008 changes an algorithm in OCS 2007 R2. This algorithm determines which Exchange Servers to use. Therefore, OCS 2007 R2 may no longer distribute the network traffic load evenly.
To fix this problem, install the following cumulative update:
(http://support.microsoft.com/kb/983472/ )Description of cumulative update for Office Communications Server 2007 R2: July, 2010
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about the latest updates for Communications Server 2007 R2, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/968802/ )Updates for Communications Server 2007 R2