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"Someone has already setup Teams for your organization"... With Office 365 Account
We have an Office 365 Business Premium user who, after changing his Office password this morning, is presented with the screen below when he attempts to login to Teams using his business email accoun...
Someone has already setup Teams for your Organization - step by step to remove rename outlook email
https://www.azure365pro.com/someone-has-already-setup-teams-for-your-organization/