Microsoft Teams - "Open with the desktop app" default setting - Microsoft Community

A colleague had the problem that he couldn't change this under windows.
The workaround here solved the problem:

Teams doesn't actually check the License, it checks the Office Installation Release ID. 

    1.  Change the registry value "HKLM:\Software\Microsoft\Office\ClickToRun\Configuration\ProductReleaseIds" to "O365ProPlusRetail"

   2.  Restart Teams

     3. Go to Teams Settings -> Files -> Open in Desktop-App

    4. Wish the responsible Microsoft decision makers who made the decision to cut off Business Premium Users (SMEs) from this setting that their pizzas always fell on the topping side.

#teams #microsoft #ms #tip

https://answers.microsoft.com/en-us/msteams/forum/all/microsoft-teams-open-with-the-desktop-app-default/2fcb9926-a430-4d68-b5c0-3be2b359ff8b?page=3