Article ID: 2621403 - View products that this article applies to.
Consider the following scenario:
This issue occurs because the Exchange store driver and the calendar assistant incorrectly sets the meeting response to processed when the associated calendar item is not available.
To resolve this issue, install the following update rollup:
(https://support.microsoft.com/kb/2645995/ )Description of Update Rollup 1 for Exchange Server 2010 Service Pack 2
To work around this issue, use Outlook in online mode to send the meeting request.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2621403 - Last Review: February 13, 2012 - Revision: 1.0