Fix for Hyper-V Backup Error 0x80780049 (ID 517)

The error 0x80780049 (ID 517) reported by Windows Server Backup may be due to running a Windows Server 2012 (incl. R2) VM on a Server 2012 (R2) host.

 

A much better solution is to use BackupChain instead of Windows Server Backup, for many reasons, such as the additional feature set.

 

To fix your installation on Windows 8 or Windows Server 2012 install hotfix KB2918371:

https://support.microsoft.com/kb/2918371

 

On Windows 8.1 or Windows Server 2012 R2 install the hotfix KB2919355:

https://support.microsoft.com/kb/2919355

Steps to reproduce this behavior in Windows Server Backup: On a Windows Server 2012 Hyper-v server and a VM running Windows Server 2012

  • Run Windows Server Backup on the host
  • Select Backup Schedule
  • click Custom on the Select Backup Configuration tab
  • Select Add Items, select host component and the VM
  • You then reboot the host.

The scheduled backup then fails with backup ID 517 and error 0x80780049.

 

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