Article ID: 2500903 - View products that this article applies to.
Consider the following scenario:
Note This issue does not occur in Microsoft Office Outlook.
To resolve this issue, install the following update rollup:
(http://support.microsoft.com/kb/2579150/ )Description of Update Rollup 4 for Exchange Server 2010 Service Pack 1
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2500903 - Last Review: July 28, 2011 - Revision: 3.0