Troubleshooting Azure VM Backup failures: “Snapshot VM sub task timed out” error

Published Feb 16 2019 03:34 AM 3,889 Views
First published on TECHNET on Apr 28, 2016
Here’s a quick tip for you in case you’re using Microsoft Azure Backup for infrastructure as a service (IaaS) and a scheduled VM backup fails with the following error message in the job error details in the Azure Portal:

Could not communicate with the VM agent for snapshot status - Snapshot VM sub task timed out.

There are four common causes for this error:

  • The VM does not have Internet access.

  • The Microsoft Azure VM agent installed in the VM is out of date (for Linux VMs).

  • The backup extension failed to update or load.

  • The snapshots status cannot be retrieved or the snapshots cannot be taken.


To read about the solutions for each of these, please see the following:



Azure VM Backup fails: Could not communicate with the VM agent for snapshot status - Snapsh...

J.C. Hornbeck , Solution Asset PM
Microsoft Enterprise Cloud Group

Version history
Last update:
‎Mar 11 2019 10:30 AM
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