The Windows Server 2008 VSS backup plug-in cannot back up Exchange 2007 Service Pack 2 databases that reside on a volume mount point

Microsoft Exchange Server 2007 Service Pack 2 introduced a Volume Shadow Copy Service (VSS) plug-in to enable Windows Server 2008 to back up Exchange Server 2007 databases. If the Exchange Server 2007 databases reside on a volume mount point, Windows Server 2008 cannot back up these databases. When you try to back up these databases, you receive an error message that resembles the following: Additionally, the Exchange Server database logs are not truncated as expected.

This issue occurs because Windows Server 2008 cannot determine the relative path for the volume shadow copy of the Exchange Server database files. This prevents the verification of the Exchange Server databases.

For more information about how to assign a volume mount point to a drive, visit the following TechNet Web site:

To resolve this issue, download and install Update Rollup 2 for Exchange Server 2007 Service Pack 2. For more information about Update Rollup 2, click the following article number to view the article in the Microsoft Knowledge Base:

Prerequisites

The following list contains prerequisites for the update rollup:

• You must have Microsoft Exchange Server 2007 Service Pack 2 installed to install this update rollup. For more information about how to obtain the latest Exchange Server 2007 service pack, click the following article number to view the article in the Microsoft Knowledge Base:
  937052� How to obtain the latest service pack or update rollup for Exchange 2007