Forum Discussion
Problem with adding phone number to MS Teams
Adam1 See these for guidance.
https://support.microsoft.com/en-us/office/troubleshoot-signing-in-or-up-11d069b4-3f7c-4352-a39e-2c8cd2b4f164
https://docs.microsoft.com/en-us/microsoftteams/troubleshoot/teams-sign-in/someone-has-already-setup-teams
So I cannot use the same phone number for my personal account and work account?
Regarding error that my account is already set up none of these steps worked for me.
Adam1 I suggest you follow the instructions provided in the first link to, for ex., create an alias and remove the phone number from the primary account. I would also use InPrivate windows doing that.
Regarding the "Someone..." this can be one of a couple of things, such as a user has signed up for self-service subscription using your domain name etc. Difficult to say with the information provided.