Microsoft KB Archive/936300

= A mailbox move operation stops responding when you move a mailbox from an Exchange 2003 mailbox store or from an Exchange 2007 mailbox store to another Exchange 2007 mailbox store =

Article ID: 936300

Article Last Modified on 8/27/2007

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APPLIES TO


 * Microsoft Exchange Server 2007 Enterprise Edition
 * Microsoft Exchange Server 2007 Standard Edition

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SYMPTOMS
When you move a mailbox from a Microsoft Exchange Server 2003 mailbox store or from a Microsoft Exchange Server 2007 mailbox store to another Exchange 2007 mailbox store, the mailbox move operation stops responding on the Exchange 2007 server.



CAUSE
This problem occurs because a heap corruption in the Exschema.exe process may cause a deadlock when multiple threads try to initialize the ExProps subsystem.

The Exschema.exe process initializes a remote procedure call (RPC) to the Store process. Then, the ExoleDB Sync event triggers on the Store process when the Store process receives the RPC call from the Exschema.exe process. During this time, if a mailbox move operation is initiated, the mailbox move operation waits for the ExoleDB Sync event to be finished. This blocks the mailbox move operation.



RESOLUTION
To resolve this problem, install Update Rollup 4 for Exchange 2007. For more information about Update Rollup 4 for Exchange 2007, click the following article number to view the article in the Microsoft Knowledge Base:

940006 Description of Update Rollup 4 for Exchange 2007



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

For more information about the naming schema for Exchange Server software updates, click the following article number to view the article in the Microsoft Knowledge Base:

817903 New naming schema for Exchange Server software update packages

Keywords: kbqfe kbexpertiseinter KB936300

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