As stated in the last update, the ability to use multiple Teams accounts at the same time is being implemented in stages for Desktop. Faster tenant switching functionality on the Windows client has been rolled out to the public ring fully, and Mac will begin rolling out soon. Work is in progress on cross-tenant notification improvements, and support for multiple accounts on desktop will follow. We’ll keep you posted!
Note: The ability to use multiple Teams accounts at the same time is supported on iOS & Android today.
Alex & the Teams team
No update since July from admin? Please provide one.
Just tried switching and realized this is a problem, when you have been setup with same account on external third party tenant as your own office365 login and teams. It is appearing blank for me in a new incognito window on external tenant, errors when trying to use the same window.
If anyone is still hitting this issue, please respond in the comments section of this topic and let me know!
Getting an issue at 2b step. It seems to bypass this for a new user and goes to page for teams tenant. Shows 1 teams group in this instance that new user was invited to and errors back when user clicks on it.