One of the biggest limitation of Virtual Server 2005 was the impossibility to backup the running virtual machines with NTBackup.
When Microsoft moved to Windows Server 2008 and Hyper-V this limitation was finally removed, but the capability is not exactly out of the box.
To achieve the goal customers must manually create some new keys in the Windows Registry so that the Hyper-V Volume Shadow Service (VSS) writer can interact with the new Windows Server Backup (WSB).
The configuration also has some serious limitations:






