This Phone Number Is Already Taken

ThereseSolimeno wario01 etw0789 carlyn369 VGriffin 

Should be this article 

https://support.microsoft.com/en-us/office/troubleshoot-phone-number-already-taken-in-teams-11d069b4-3f7c-4352-a39e-2c8cd2b4f164

Adding these on the topic as well.

https://support.microsoft.com/en-us/office/adding-your-phone-number-to-a-microsoft-account-c0fad622-6a0e-4b7d-90a5-59a4dabf053b

https://support.microsoft.com/en-us/office/change-your-phone-number-or-email-address-ac25973e-ad82-41c8-a8f8-47bf40c69580

If someone have no idea what account that could be associated with the phone number, the number can be entered here to get an indication of that https://account.live.com/username/recover