How to Resolve Message-Level Backup Errors in Microsoft Exchange 2010

If you encounter the error message "Error listing messages in a folder" or the message "Error opening message" when running message-level backups:

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This error is due to backup threads established to your Exchange Server that are timing out. To resolve this issue, apply Service Pack 3 (SP3) to Exchange Server 2010, available from the Microsoft download center: http://www.microsoft.com/en-us/download/details.aspx?id=36768