I have a few 2008 R2 VMs on 2012 R2 Hosts that I'm unable to perform online backups for. They were originally capable, but now offline is the only available option.
I've gone through the following checklist and everything appears to be in order:
- The Backup (Volume Snapshot) Integration Service is disabled or not installed.
- A virtual machine has one or more dynamic disks.
- A virtual machine has one or more volumes that are based on non-NTFS file systems.
- In a cluster configuration, the virtual machine Cluster Resource Group is offline.
- A virtual machine is not in a running state.
- A Shadow Storage assignment of a volume inside the virtual machine is explicitly set to a different volume other than itself.
Is there something else I can look into to see why Hyper-V has determined this is no longer an option for the VM? I've also, moved and recreated the VM using the same disks.