Hi
My name is Daniel. I am an Independent Advisor.
Please visit this link below to change your email:
https://support.microsoft.com/en-ca/help/12407/...
Please scroll down the article and click on the section under "I want to use a different email address or phone number to sign in".
Disclaimer:
Please note, this is a peer-to-peer support forum meaning I'm just fellow regular MS Team forum users like you who are trying to help other MS Team forum users with their MS Team issue. So in this case, I'm Non-Microsoft Staff I don't have access to your account nor I'm authorized to do so. I hope we can have a mutual understanding from the beginning to prevent misunderstanding.
Kind Regards