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The backup may fail when you use a third-party backup product to perform a backup on a Windows Server 2008-based NPS computer
Article ID: 949470 - View products that this article applies to.
When you use a third-party backup product to perform a backup on a Windows Server 2008-based Network Policy Server (NPS) computer, the backup may fail.
This problem may occur when you do not configure the NPS role.
This problem occurs because the backup software follows the Volume Shadow Copy Service (VSS) documented backup method. If the NPS Writer reports that a file does not exist on the system, the backup fails.