Error message when you run the Export-Mailbox command on a folder that has more than 5000 items in Exchange 2007: "-1056749164"

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SYMPTOMS

When you run the Export-Mailbox command on a Microsoft Exchange 2007 mailbox that has more than 5000 items in one folder, the command fails. Additionally, you receive the following error message:

Export-Mailbox: Error was found for <mailbox name> (<SMTP address>) because: Error occurred in the step: Moving messages. Failed to copy messages to the destination mailbox store with error: An unknown error has occurred. error code: -1056749164

For example, this problem occurs when you run the following command in the Exchange Management Shell:

Export-Mailbox -Identity <mailbox name> -IncludeFolders "\inbox" -DeleteContent -DeleteAssociatedMessages

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CAUSE

During the processing, the involved buffer has a 32 kilobyte (KB) restriction. If the target folder has more than 5000 items, the buffer restriction is exceeded. Therefore, the problem occurs.

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RESOLUTION

To resolve this problem, install Update Rollup 8 for Exchange 2007 Service Pack 1.

For more information about Update Rollup 8 for Exchange Server 2007 Service Pack 1, see the following Exchange Help topic:

Description of Update Rollup 8 for Exchange Server 2007 Service Pack 1 (http://go.microsoft.com/fwlink/?LinkId=157084)

For more information about how to obtain the latest Exchange service pack or update rollup, see the following Exchange Help topic:

How to Obtain the Latest Service Pack or Update Rollup for Exchange 2007 (http://go.microsoft.com/fwlink/?LinkId=152570)

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