Uninstalling the app
Open Microsoft Teams.
Select the "· · ·" on the left sidebar. Right click on the Mio Universal Channels app icon. Choose "Uninstall".
Check that it's removed at the "team" level
Navigate to the team that you picked when you first installed the app.
Select the "· · ·" next to the team you wish to uninstall Mio Universal Channels on, and choose Manage team.
Click Apps on the top bar, scroll until you see Mio Universal Channels and click the trash can icon on the right.
You have successfully uninstalled Mio Universal Channels in Microsoft Teams.