This is commonly asked question, please use search next time. For Teams free, follow the instructions here: https://learn.microsoft.com/en-us/microsoftteams/troubleshoot/teams-sign-in/someone-has-already-setup-teams
For Teams as part of O365: https://learn.microsoft.com/en-us/azure/active-directory/users-groups-roles/domains-admin-takeover
How to take over admin roole for Teams?
I am working for Medycyna Praktyczna which is the only owner of "mp.pl" domain. Medycyna Praktyczna have some subscriptions of Office 365 (actually Microsoft 365) and an admin address is ******@medycyna.onmicrosoft.com and it is controlled by me. The problem is that if someone of our staff try to login to MS Teams free version, he gets a message that "Someone has configured Teams application for Your organisation, ask Your administrator etc.." Anybody of our workers know that administrator. It could be the first person who logged in with the email address ******@mp.pl and it could be a long time ago. We have plenty of email accounts of our costumers created within a domain "mp.pl".
How can I find out who is that mysterious administrator of our Teams and than how to take his role over?
Best regards
Jaroslaw Zemla
Microsoft Teams | Microsoft Teams for business | Other
1 answer
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Vasil Michev 119.9K Reputation points MVP Volunteer Moderator
2021-12-22T13:15:35.733+00:00