- Veeam Support Knowledge Base
- Exchange Backup Jobs Warning "Failed to find group owner account"
Exchange Backup Jobs Warning "Failed to find group owner account"
| KB ID: | 3105 |
| Product: |
Veeam Data Cloud
for Microsoft 365 Veeam Backup for Microsoft 365 | 6.0 | 7.0 | 7a | 8 | 8.1 | 8.2 | 8.3 | 8.4 | 8.5 | 8.6 Veeam Backup for Microsoft Office 365 | 3.0 | 4.0 | 5.0 |
| Published: | 2020-02-13 |
| Last Modified: | 2026-08-25 |
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Challenge
Backup jobs with Microsoft Exchange items may result in the warning message shown in both the Veeam Backup for Microsoft 365 console and the Veeam.Archiver.Proxy.log file.
Processing mailbox {$mailboxName} completed with warning: Failed to find group owner account
This appears in the Veeam.Archiver.Proxy log file as:
Resolving group: 753da553-b4dd-45ad-a773-180aa920c887:00000000-0000-0000-0000-000000000000...
Group found: TestOwnerGroup
Resolving group mailbox (ID: 753da553-b4dd-45ad-a773-180aa920c887:00000000-0000-0000-0000-000000000000)...
Found group mailbox: testgroup@organization.onmicrosoft.com
Warning: Failed to find group owner account
Cause
The Veeam software is unable to impersonate Microsoft 365 groups (mail-enabled and security groups) that do not have an owner assigned.
Solution
Make sure to assign an owner to each of the Office 365 groups (mail-enabled and security groups) as described in this Microsoft article.
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