Microsoft is releasing a fix for the classic Outlook crash affecting users running the latest version of the Teams Meeting Add-In.
Microsoft is fixing an issue where the classic Outlook email client became unusable for users who had the Microsoft Teams Meeting Add-in enabled. This bug was reported on March 12 and acknowledged by Microsoft about a week later. Users can now resolve this issue by updating to the latest build of Outlook.
Teams Meeting Add-in
About a week after the initial report, Microsoft acknowledged the bug in a Microsoft 365 incident report (EX1254044). “Starting around March 12, 2026, classic Outlook may crash and subsequently start in Safe Mode. This issue occurs when older versions of classic Outlook use the latest version of the Teams Meeting Add-In build 1.26.02603,” according to Microsoft.
Microsoft has since introduced a fix to resolve the issue with the Microsoft Teams Meeting Add-in. This was included in Microsoft Teams version 26058.712.4527.9297, which was rolled out starting March 30, 2026.
Solution
To resolve the issue, you should update Outlook to the latest build. Open Outlook in Safe Mode by holding down the Ctrl key while launching the application. Then click File > Options > Add-ins > Go. In the COM Add-ins window, uncheck the Microsoft Teams Meeting Add-in for Microsoft Office and select OK.