Microsoft 365 Alert – Service Degradation – Exchange Online – Some users may be unable to manage Distribution Groups in Outlook on the web – RESOLVED

23/07/2024 16:25:00 PM

NHSmail Reference: INC44554599

Microsoft Reference: EX831706

Issue Status: RESOLVED

Issue Description: Some users may be unable to manage Distribution Groups in Outlook on the web.

Final Update: 24/07/2024 08:51:00 AM – Microsoft have completed reverting the recent update and confirmed with some users who initially reported the issue that the impact is remediated.

Scope of impact: Some users that attempted to manage Distribution Groups in Outlook on the web may have been impacted.

Root cause: A recent service update, intended to fix another search and filter issue in the EAC, is inadvertently preventing users from managing their Distribution Groups in Outlook on the web.

Next steps: Microsoft are further reviewing the service update to understand how the code issue was introduced, and to understand what prevented it from being detected in their update testing and validation procedures, which will allow them to prevent similar issues in future updates.