Hi SteveBarkhuizen,
If we sign up an Office 365 tenant, the default domain is contoso.onmicrosoft.com. The global admin account looks like *** Email address is removed for privacy ***. When signing up the Office 365 tenant, we need another business email address as below. Therefore, may I
know if you can remember the email address so that you can check if there are any emails from Office 365 when signing up the Office 365 account?
If
you are not a global admin, I would suggest you contact the global admin in your Office 365 tenant to check the User ID for you.
Regards,
Shirley