Outage in Veeam Data Cloud
M365 - "Mailbox is not fully configured" Error During Exchange Backup
Resolved Minor
October 22, 2025 - Started 13 days ago
- Lasted 9 days
Incident Report
We have identified an issue that is causing Exchange backup failures for some customers, with an error message of "Mailbox is not fully configured." Veeam's team is working with Microsoft to remediate the issue. An update will be provided when it's resolved.
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Latest Updates ( sorted recent to last )
MONITORING
8 days ago - at 10/27/2025 08:41PM
The root cause has been identified with the solution ready to be rolled out. This solution will be distributed within the maintenance cycles preliminary scheduled this week (you may track here "https://vdcstatus.veeam.com/incidents/01k88t9py9mqq6r5vzpm5s3e3v": https://vdcstatus.veeam.com/incidents/01K88T9PY9MQQ6R5VZPM5S3E3V)
IDENTIFIED
12 days ago - at 10/24/2025 12:48PM
The root cause has been identified and we are finalizing a solution. We appreciate your patience as we work to resolve this issue as soon as possible.
INVESTIGATING
13 days ago - at 10/22/2025 05:05PM
We have identified an issue that is causing Exchange backup failures for some customers, with an error message of "Mailbox is not fully configured." Veeam's team is working with Microsoft to remediate the issue. An update will be provided when it's resolved.
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