Microsoft is updating how Word, Excel, and PowerPoint files open from Teams. Users who previously chose Teams as their default for opening these files will now have their preference automatically switched to either the desktop or web app.
This adjustment is being made to improve file reliability and bring the experience more closely in line with how most people already work with Office files across Microsoft 365.
When a Word, Excel, or PowerPoint file is opened from a chat, channel, or the Shared area in Teams, it will now open outside the Teams window:
- In the corresponding desktop app, if installed on the device.
- In the browser, if the desktop app is not installed or if Teams on the web is being used.
Anyone who prefers the previous behavior can switch the default back to Teams through their Teams settings.
This update applies to all Business and Enterprise users with Microsoft Teams and should be completed in May 2026.
