Allow removing entries from the Tenant picker
If a user has been invited to another tenant, that tenant will show on the Teams tenant picker dropdown. If that user later wants to leave that tenant, there doesn't appear to be a way for the user to do that.
I would request you allow users to remove themselves from other tenants they have joined. Similar to how a user can leave a Team they have joined.
This is going to be a HUGE spam issue if it doesn't get fixed soon. It's CRAZY this is possible!
Phillipe's way of working does seem to work but it's not connected to the teams app and uses a page our users have never seen before and without understanding the tenancy concept they will likely sign out of the wrong thing. Having the capability in the App you signed up in would be better.
Philippe Signoret commented