===== [V7] ISSUE: Unexpected error querying for the IVssWriterCallback interface. Access is denied (Hyper-V VM backup / restore) =====
Article ID:
5256
Reviewed:
2017-07-17
Product Version:
AhsayOBM / AhsayOBR: 7.5.0.0 to 7.x
OS: Windows
ATTENTION
1st January, 2022: v7 officially End-of-Life [details]
===== Description =====
When performing a backup or restore of a Hyper-V guest virtual machine, the following error message is logged in the Window Event Viewer:
Volume Shadow Copy Service error: Unexpected error querying for the IVssWriterCallback interface. hr = 0x80070005, Access is denied
Although, there are VSS related errors the Hyper-V guest backup / restore jobs was completed successfully without any warnings or errors.
===== Cause =====
This VSS related error is caused by a Window VSS configuration issue.
Note: This error does not affect the integrity of the guest virtual machine backup or restore job.
===== Resolution =====
To resolve this problem: