User impact: Users see incorrect room availability information in the Room Finder within Exchange Online.

More info: Affected users may see inconsistent information between Scheduling Assistant and Room Finder within Exchange Online, specific to room availability.

Impact may manifest in any Exchange Online connection method, including but not limited to the Outlook desktop client and Outlook on the web.

Current status: We’ve rolled back the offending service update and the service health telemetry appears to be stable after an extended period of monitoring. Additionally, we’re reaching out to a subset of affected users to ensure that impact has been remediated.

Scope of impact: Some users serviced by the affected portions of infrastructure see incorrect information when using the Room Finder within Exchange Online.

Start time: Monday, October 21, 2024, at 3:52 PM UTC

Root cause: A change contained within a recent service update that’s altering the way certain time zone-related data was being handled by the service to resolve an unrelated issue is resulting in impact.

Next update by: Friday, October 25, 2024, at 5:00 PM UTC