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ONE Sentinel

securitySecurity/THREATS/MED

Microsoft: Enabling Teams Meeting add-in breaks Outlook Classic

sourceBleeping Computer
calendar_todayMarch 17, 2026
schedule1 min read
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EXECUTIVE SUMMARY

Microsoft Teams Add-in Disrupts Outlook Classic Functionality

Summary

Microsoft is addressing an issue where enabling the Microsoft Teams Meeting Add-in causes the classic Outlook email client to become unusable.

Key Points

  • The issue affects users who have enabled the Microsoft Teams Meeting Add-in in Outlook Classic.
  • Microsoft is aware of the problem and is actively working on a solution.
  • The problem renders the Outlook Classic client unusable, impacting user productivity.
  • No specific timeline for a fix has been provided by Microsoft.

Analysis

This issue highlights the potential for software conflicts when integrating different applications, such as Microsoft Teams and Outlook Classic. The disruption of a widely used email client like Outlook can significantly impact business operations, especially for organizations heavily reliant on these tools for communication and scheduling.

Conclusion

IT professionals should monitor Microsoft's updates for a resolution to this issue and consider advising users to disable the Teams Meeting Add-in temporarily if they experience disruptions in Outlook Classic functionality.