Users may be unable to access Notes in Outlook on the web

Title: Users may be unable to access Notes in Outlook on the web User impact: Users may have been unable to access Notes in Outlook on the web. More info: Affected users may have found that the Notes interface remained in a loading state and didn't display their existing notes. Other Outlook on the web functionality remained available. Final status: We've confirmed with a subset of affected users that impact was resolved successfully following our revert of the affected service setting. Scope of impact: Any user who attempted to access Notes in Outlook on the web may have been impacted. Start time: Friday, October 30, 2026, at 7:52 AM UTC End time: Friday, October 30, 2026, at 1:10 PM UTC Root cause: A configuration issue caused requests for Notes in Outlook on the web to fail, which resulted in users being unable to access their notes. Next steps: - We're reviewing our update procedures to understand why the configuration issue wasn't caught during the testing phase. This will allow us to drive service improvements by proactively identifying similar issues in the future and improve our update testing processes. This is the final update for the event.

Title: Users are unable to access Notes in Outlook on the web User impact: Users are unable to access Notes in Outlook on the web. More info: Affected users may find that the Notes interface remains in a loading state and doesn't display their existing notes. Other Outlook on the web functionality remains available. Current status: We’ve successfully reverted the affected service setting and confirmed through our internal testing that access to Notes has been restored. We’re awaiting confirmation from your organization's representative to validate recovery for affected users. Scope of impact: Your organization is affected by this event, and all users attempting to access Notes in Outlook on the web are impacted. Start time: Friday, October 30, 2026, at 10:17 AM UTC Root cause: A configuration issue caused requests for Notes in Outlook on the web to fail, resulting in users being unable to access their notes. Next update by: Monday, November 2, 2026, at 2:00 AM UTC

Title: Users are unable to access Notes in Outlook on the web User impact: Users are unable to access Notes in Outlook on the web. More info: Affected users may find that the Notes interface remains in a loading state and doesn't display their existing notes. Other Outlook on the web functionality remains available. Current status: We’re reverting the affected service setting rather than deploying an updated version, and will monitor this action to confirm whether it restores users’ access to Notes. We’ll provide an update on our progress as this process continues. Scope of impact: Your organization is affected by this event, and all users attempting to access Notes in Outlook on the web are impacted. Next update by: Friday, October 30, 2026, at 2:00 PM UTC

Title: Users are unable to access Notes in Outlook on the web User impact: Users are unable to access Notes in Outlook on the web. More info: Affected users may find that the Notes interface remains in a loading state and doesn't display their existing notes. Other Outlook on the web functionality remains available. Current status: We’ve identified a recent service update is causing impact to Notes in Outlook on the web. We’re deploying an updated version to the affected environment and expect this to restore access to Notes. We’ll validate service functionality as the update progresses. Scope of impact: Your organization is affected by this event, and all users attempting to access Notes in Outlook on the web are impacted. Next update by: Friday, October 30, 2026, at 11:30 AM UTC