Microsoft 365 Alert – Service Degradation – Exchange Online – Users who are scheduling meetings may not receive accurate declined email messages in Exchange Online – RESOLVED
22/10/2025 09:28:00 AM
NHSmail Reference: INC46677889
Microsoft Reference: EX1184307
Issue Status: RESOLVED
Issue Description: Some users who are scheduling meetings may not receive accurate declined email messages in Exchange Online
More info: Specifically, when users send a meeting invitation that is declined by a resource room, the email response may be missing the Organizer’s details.
As a way to avoid impact, users can enable Auto Room Booking for the event. To enable this feature, once the users add attendees and select the correct time, there is an “Add room with Copilot” button which will enable Auto Room Booking. Once this is enabled, users will see “Copilot Managed” and “Copilot will rebook if the room declines or the meeting is rescheduled”. Additionally, when viewing the “Places finder”, it will also show this feature enabled once users click “Add a room or location”, then “Browse all rooms”, users will see “Rebook declined rooms” toggled on.
In order to enable this feature, users must have an active Copilot license and be scheduling meetings using the Outlook (new), Outlook on the web or Microsoft Teams.
Final Update: 02/12/2025 09:32:00 AM – The fix has fully saturated in the affected service environment, and after validating internally in our test environment, Microsoft have confirmed that impact has been successfully remediated.
Scope of impact: Some users who are scheduling meetings that are being declined by a resource room may be impacted.
Root cause: A recent deployment implemented a design change that’s preventing the Organizers details from reflecting properly when a meeting invitation is declined by a resource room.
Next Steps: Microsoft are reviewing their feature and design change update testing to better identify the potential for impact to declined email message details prior to deployment, to help prevent similar impact in the future and improve our pre-deployment update testing processes.
