In a Microsoft Exchange Server 2007 environment, you run the Export-Mailbox command together with the DeleteContent parameter in Exchange Management Shell. When you do this, an incorrect value for DumpsterMessagesDeleted is reported.
Exchange Server 2007 uses an internal counter for DumpsterMessagesDeleted. This internal counter is calculated incorrectly.
To resolve this problem, install the following update rollup:
972076 Description of Update Rollup 2 for Exchange Server 2007 Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about Export-Mailbox, visit the following Microsoft Web site: