Title: Some users’ new meetings created in the Outlook desktop client may automatically include Microsoft Teams meetings
User impact: Users’ new meetings created in the Outlook desktop client may have automatically included Microsoft Teams meetings.
More info: Impact was specific to the Microsoft Teams meeting add-in for the Outlook desktop client build versions 1.0.23125 and above.
Impact occurred despite users unchecking “Add online meeting to all meetings” in Outlook Calendar settings. Users could also disable the add-in to avoid this issue.
While we were working to remediate this impact, affected users could have created non-Microsoft Teams meetings using the following steps:
1. Access the New Meeting dropdown in the Calendar ribbon of Outlook.
2. Select the New meeting request option in the menu by right clicking on Outlook calendar.
Final status: We’ve confirmed that the fix has completed deployment throughout the affected environments, and after monitoring the service, we’ve verified that the fix has successfully remediated the problem.
Scope of impact: Users leveraging the Microsoft Teams meeting add-in for the Outlook desktop client build versions 1.0.23125 and above and attempting to create new meetings in the Outlook desktop client may have been affected.
Start time: Thursday, June 15, 2023, at 4:34 PM UTC
End time: Monday, September 18, 2023, at 8:13 PM UTC
Root cause: Some changes intended to optimize the Microsoft Teams meeting add-in for the Outlook desktop client interacted negatively with the code path leveraged in specific older Outlook desktop versions, subsequently resulting in impact.
Next steps:
– We’re investigating how the Microsoft Teams meeting add-in optimizations for the Outlook desktop client interacted negatively with the code path leveraged in specific older Outlook desktop versions to prevent this problem from happening again.
This is the final update for the event.
