Microsoft 365 Alert – Service Degradation – Exchange Online – Admins may see accepted domains not provisioning in Exchange Online after migration – RESOLVED

Announcements Sourav Nandi

08/09/2025 08:55:00 AM

NHSmail Reference: INC46622697

Microsoft Reference: EX1148496

Issue Status: RESOLVED

Issue Description: Admins may see accepted domains not provisioning in Exchange Online after migration.

More info: Users whose mailboxes are hosted on affected domains may be unable to send or receive email messages until the issue is resolved and the domains are successfully provisioned.

Final Update: 08/09/2025 10:30:00 AM – The fix for new provisioning requests has been successfully deployed, and service telemetry confirms that the issue has been fully resolved.

Scope of impact: This issue may potentially impact any admins performing migrations with accepted domains.

Root cause: A recent update to improve the provisioning and deprovisioning actions in Exchange Online is causing some previously accepted domains to not provision as expected after migration.

Next steps: Microsoft are reviewing their update procedures to better identify similar issues during their development and testing cycles.