Multiple Microsoft email address

Question

I somehow created multiple email address that end in [Moderator note: Personally Identifiable Information removed] and [Moderator note: Personally Identifiable Information removed] that I can not log into to figure out how to delete them so I may use 1 account only [Moderator note: Personally Identifiable Information removed] for everything, teams , all the apps etc. The @onmicrosoft accounts are not signed in on the authenticator so I cant access them.

Answer 1

Hi Valentina,

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Answer 2

The onmicrosoft.com addresses belong to separate Microsoft 365 tenants and cannot be merged or deleted from the outside. The practical goal is to:

1. Decide which tenant/domain to keep as the primary (your travvale.com tenant).
2. Regain access to the admin account for that tenant.
3. Stop using the other onmicrosoft.com tenants and move any needed data manually.

Because the onmicrosoft.com accounts are not in Microsoft Authenticator and can’t pass MFA, the only supported way to regain access to an admin account in such a situation is through Microsoft support and the Data Protection team.

Use this approach:

1. Confirm which tenant is the “real” one
   • Identify which sign‑in you use for your active Microsoft 365 subscription (Teams, email, etc.) – that is the tenant to keep (likely the one where travvale.com is added as a custom domain).
   • Do not close or change that account until access is stable.
2. If locked out of the only admin account for the correct tenant
   • When there is only one admin and MFA (Authenticator) is lost, Microsoft’s Data Protection team must verify identity and reset access.
   • Call Microsoft support using the appropriate Customer service phone numbers page and clearly state:
   – This is an Office 365/Microsoft 365 for business tenant.
   – It is a company account (not education, not personal).
   – The caller is the global administrator.
   – There are no other admins.
   – MFA is blocking access (Authenticator lost / not configured on new phone).
   • Ask the frontline agent to open a service request and escalate to the Data Protection team to reset MFA / regain admin access. If the subscription came via a partner/reseller and the admin cannot open a ticket, contact the reseller and ask them to open a Microsoft support ticket on your behalf.
3. Alternative path if completely locked out of the portal
   As described in the context, one workaround is to create a temporary trial tenant just to reach support:
   • Start a Microsoft 365 Enterprise trial and complete setup (this is a separate tenant).
   • Go to https://admin.microsoft.com → Support → Help & support.
   • Open a ticket explaining that the real problem is a different, existing tenant (the one with travvale.com) where the only global admin is locked out by MFA.
   • Provide:
   – Admin UPN/email for the locked tenant.
   – The travvale.com domain name.
   – Error messages and that Authenticator is the only MFA method.
   • After the issue is resolved, cancel the trial so it doesn’t incur charges.
4. Once admin access is restored on the correct tenant
   • Add at least one additional global admin and additional MFA methods (phone, email, security keys) so a single lost device does not lock out the tenant again.
   • Ensure travvale.com is the primary domain and use only accounts in that tenant for Teams and all apps.
5. About the extra onmicrosoft.com tenants
   • Tenants like travvalellc.onmicrosoft.com and travvale.onmicrosoft.com are separate directories. They cannot be “merged” into the travvale.com tenant.
   • Any data or licenses in those tenants must be accessed (via support if locked out) and moved manually to the main tenant.
   • If they are empty or unused and you can sign in as admin, you can close those tenants; if you cannot sign in at all and they have no active subscriptions, they will simply remain unused and eventually age out.

If any of the accounts are personal Microsoft accounts (MSA) rather than work/school (Microsoft Entra ID), they also cannot be merged. In that case, the only supported pattern is to close the unwanted MSA and, if needed, reuse its email as an alias on the main account, but purchases and data do not transfer.

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References:

• Troubleshooting suggestions for signing in to Visual Studio subscriptions
• Common problems with two-step verification for a work or school account
• I have a Micrsoft business account and I am the admin and the only user registered under this account. I can't log in because i have replaced my phone and the authenticator doesn't work. - Microsoft Q&A
• Microsoft authenticator sending me into a spiral - Microsoft Q&A
• I realize I have 2 different accounts. How do I combine the 2? - Microsoft Q&A
• Which account do you want to use?
• How do I merge my OneDrive for home with my OneDrive for work or school ?
• How to sign out from Authenticator
• Sign out or remove an account from Microsoft Teams
• Add or remove an email alias in Outlook.com