Additional sign-in or account-related issues within Microsoft Teams Free
Hi AmblyoMoron,
Thanks for your post on the community forum. I'm Nik, an independent advisor here to assist you with this.
To narrow down the issue, could you please go to https://account.live.com/names/Manage and check if you see another email address linked as an alias to your Microsoft account?
Do you see any difference in sign-in preference from the earlier set on your Microsoft account?
To know more about Change the email address or phone number for your Microsoft account, see:
https://support.microsoft.com/en-us/account-bil...
Please be advised that due to privacy security, your email address are masked in the community forum.
Regards
Nik