Microsoft Teams Desktop App Multiple Accounts. Another issue i have is that even though i've set the new experience in my settings for each account. It will apparently make it possible for teams users to add additional accounts to the desktop app and switch between them without logging out of their main account.

As a caveat, it’s important to note that we aren’t actually launching multiple desktop teams clients. Click to the team/channel you want the app to launch at. There is a workaround to use two different microsoft teams accounts at the same time.
With this upcoming support, teams users will be able to add additional accounts, change their profile picture, and switch between […]
Then “install this site as an app” you will get a nice “app” experience and a shortcut on the desktop. On teams mobile it works flawlessly, on the desktop not so much. Microsoft is finally working on a new feature that will allow users to switch between multiple accounts when using the desktop client of microsoft teams. It seems this potential feature is not the only one that microsoft is testing out in order to improve user.