Hi, I posted this yesterday on Microsoft Answers but they told me to post it here, so here goes......
I'm a Linux Mint user with the Teams app installed. I used to use Windows back in 2009 so I have a Live ID that I use for Skype and anything else that occasionally needs it. I do not have a paid Office account.
A couple of years ago I had a contract to work for an organisation that was fully Office 365'd so I used to log into their Teams using an email address they gave me. Once I left, that email address was then deleted.
Now, over a year later, a new client sent me a Teams meeting request. Now I find I can't log in to Teams at all, either via a browser or the Microsoft Teams for Linux app. It all seems to be due to the LiveID authentication system.
At first I enter my only email address then I'm asked whether to use Work or Personal account. (I only have ONE email address remember), if I choose "Personal" I then enter my password and wait. Then I see "Someone has already set up Teams for your organisation". Well they (I) haven't. So if I then select "Use a different Email" a web page opens showing me as logged in to Microsoft.com. If I log out and click "Sign up for free" it say's I'm already logged in and if I then continue I'm back in the app where "Someone has already set up Teams for your organisation".
If I sign out of the app and sign back in again and this time select Work and enter my password and wait for ages I then get "You're missing out! Ask your admin to enable Microsoft Teams for firstname.lastname@example.org"
There is one scenario which I can't recreate to order right now where when I try to log in, I get sent to my old Client's Teams page with their branding on and a big white box saying my OLD email address doesn't exist in their tenant. I mean, I don't want to use their system and I'm not even trying to log in with that old email address.
I've tried clearing cookies, uninstalling, purging and reinstalling apps, going to myaccount.microsoft.com and signing out of everything and waiting a couple of hours. There's just no way on earth I can log in and no easy way of communicating with MS hence this post.
I'm guessing there's something somewhere linking all this stuff together in the background and it's totally screwed AND there's no way the user (i.e. me as the admin) can get access to sort it out.
Any advice would be greatly appreciated.