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

16/07/2025 12:26:00 PM

NHSmail Reference: INC46580917

Microsoft Reference: EX1116086

Issue Status: RESOLVED

Issue Description: Users aren’t receiving a confirmation response in Exchange Online when Workspace Reservations and Meetings are created.

Final Update: 24/07/2025 08:50:00 AM – Microsoft have completed their investigation and determined that automation can’t be used to process past confirmation responses. They’ll be publishing a message in the “Issues for your organization to act on” section with steps that can be taken to process past confirmation responses. Regarding new confirmation responses, they’ve validated that their code fix has successfully addressed the problem and restored newly created Workspace Reservations and Meeting confirmations.

Scope of impact: Your organization is affected by this event, and some users aren’t receiving a confirmation reply in Exchange Online when Workspace Reservations and Meetings are created.

Root cause: A recent code fix to resolve an unrelated issue introduced a compatibility issue between code that’s preventing Workspace Reservations and Meetings from processing creations and populating the confirmation reply.

Next steps: Microsoft have defined a manual to outline the steps affected users can follow to reprocess past confirmation responses, and they’re working to provide the manual to all affected users.

They’re reviewing the code fix that introduced the compatibility issue and how their testing and validation procedures can be improved to detect this prior to deployment, allowing them to prevent similar impact from occurring in the future.