Outlook: Failed To Find Group Owner Account


While backing up a mailbox, the job is completed successfully, but your Veeam Data Cloud backup logs say that the job has completed with a warning: Failed to find group owner account.


When you review your completed Veeam Data Cloud backup that includes Microsoft Exchange items, you may see the following warning message in the backup session logs:


Processing mailbox <Name> completed with warning: Failed to find group owner account


Veeam Data Cloud is unable to impersonate Microsoft 365 groups (mail-enabled and security groups) that do not have an owner assigned. This is a known Veeam and Microsoft issue.


Assign an owner to each of the Microsoft 365 groups that you want to back up. For information on how to do this, see this Microsoft article.

Help And Support

If you have followed the steps outlined above, and the issue recurs in the next backup cycle, or you need help with performing these changes, you can contact Veeam Customer Support.


For information on how to check your backup session logs, see Viewing Backup Logs.