Cannot Access M365 Admin Portal

Nicholas Bromley 6 Reputation points

I have an M365 tenant that I use for testing, and I recently was trying to de-register a domain from it so I could use it in another Azure AD account. This means I had to change my admin account's domain as well. After doing that, I am now unable to log into the M365 tenant or Azure AD portal using either the old or new UPN.

I am just looking to log into the M365 portal so I can delete the tenant/account entirely.

Azure Active Directory Domain Services
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  1. Liroy Benaïm 241 Reputation points


    You can sign in with the address you created with the domain.

    For example, my account global admin is you can connect to it with the name of your tenant (example: letsgo) like this

    Hope this will work for you