Admins may see accepted domains not provisioning in Exchange Online after migration

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: We've developed a fix to restore the functionality and repair any domains that are affected during the time of impact. We've started to roll out these code changes to mitigate impact, and anticipate being able to provide a timeline for completion by our next scheduled update.

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

Start time: Wednesday, September 3, 2025, at 12:00 AM UTC

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 update by: Saturday, September 6, 2025, at 3:00 PM UTC

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: We've expanded the scope of this communication and amended the Title, User impact, and Scope of impact sections accordingly. We identified that 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. We're developing a fix to restore the functionality and repair any domains that are affected during the time of impact. We anticipate having an update on the fix progress by the next scheduled update time.

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

Start time: Wednesday, September 3, 2025, at 12:00 AM UTC

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 update by: Saturday, September 6, 2025, at 9:30 AM UTC

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: We're working to restore the affected domains to remediate the impact. We anticipate having an update on the restoration progress by the next scheduled update time.

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

Next update by: Saturday, September 6, 2025, at 2:00 AM UTC

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: While we've yet to establish why or when the affected domains were removed from the GLS, we're considering options to restore these domains and remediate impact.

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

Next update by: Friday, September 5, 2025, at 12:00 PM UTC

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: We were unable to find the affected domains in the Global Location Service (GLS). We're attempting to identify when and why they were removed to determine the root cause and a remediation strategy.

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

Next update by: Friday, September 5, 2025, at 10:00 PM UTC

Title: Admins may see accepted domains not provisioning in Exchange Online after migration

User impact: 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.

Current status: We're investigating a potential issue with Exchange Online and checking for impact to your organization. We'll provide an update within 30 minutes.