Microsoft 365 Alert – Service Degradation – Exchange Online – Users may encounter crashes in the classic Outlook desktop app when right clicking in an email message – NEW

Announcements Shagufta Naaz

01/07/2026 08:47:00 AM

NHSmail Reference: INC46866381

Microsoft Reference: EX1409958

Issue Status: OPEN

Issue Description: Some users may encounter crashes in the classic Outlook desktop app when right clicking in an email message.

More info: This issue affects users on Current Channel or Monthly Enterprise Channel version 2605. While we’re focused on remediation, users with access to the new Outlook desktop app or Outlook on the web may use these apps to bypass the impact. As an alternative option to more quickly self-mitigate and allow use of the classic Outlook app, users may update to version 2606, which isn’t affected by this problem.

Current Update: 01/07/2026 08:47:00 AM – Microsoft has initiated a reversion of the impacting change and are monitoring as it progresses. They expect this to complete by the next scheduled update.

Scope of impact: Some users on Current Channel or Monthly Enterprise Channel version 2605 right clicking in classic Outlook desktop email messages may be impacted.

Root cause: A recent accessibility change contains a code error, resulting in impact.

Next update by: Wednesday, July 1, 2026, at 10:30 PM UTC