Microsoft 365 Alert – Service Degradation – Exchange Online – Some users aren’t receiving a confirmation in Exchange Online when Workspace Reservations and Meetings are created – RESOLVED

Announcements Sourav Nandi

24/07/2025 08:40:00 AM

NHSmail Reference: INC46587268

Microsoft Reference: EX1120578

Issue Status: RESOLVED

Issue Description: Some admins may be unable to run the command Get-MailboxStatistics and get an error.

More info: Some admins attempting to run the command may see one of the following errors:

“Write-ErrorMessage : ||Cannot find MailboxStatistics objects from the root ”NAMP111DG118-db126”. Please make sure that you specified the correct search root and that you have the correct permissions to perform the search.”

“Get-MailboxStatistics: ASSERT: Attempting to convert large prop tag to 32-bit form”

As a workaround, affected admins can run the command “Get-EXOMailboxStatistics”

As an additional impact scenario, users may be unable to see usage details for both primary and archive mailboxes in Outlook on the web.

Final Update: 05/08/2025 19:00:00 PM – Microsoft confirmed that their fix to reverse the recent offending change has completed deployment to the affected environment and the issue has been resolved.

Scope of impact: Some admins attempting to run the command Get-MailboxStatistics may be impacted. Additionally, some users attempting to view primary and archive mailboxes in Outlook on the web may be impacted.

Next steps: Microsoft are reviewing their standard update procedures for to ensure similar issues are caught during testing and addressed ahead of deployment to prevent this from happening again.