I'm getting the following errors trying to backup 2 VM's on a physical server. Can't figure out the issue. Thanks in Advance!!
1st Error
Writer Microsoft Hyper-V VSS Writer experienced some error during snapshot creation. More info: .
Source SPP Event ID 16387
2nd Error
The backup operation that started at '2016-09-25T03:00:04.172000000Z' has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '0x807800A1'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.
Source Backup Event ID 521