Sole Global Administrator locked out due to MFA and no access to Microsoft Authenticator

Question

Puedes escribir algo así:

I am the only Global Administrator of a Microsoft 365 Business Basic tenant.

I accidentally removed the administrator account from Microsoft Authenticator and now I cannot complete MFA.

I have no alternative authentication methods configured and I am locked out of the Microsoft 365 Admin Center.

I still know the username and password, but I cannot pass the authentication step.

I need assistance resetting MFA for the administrator account or recovering access to the tenant.

Answer 1

Hi Julian Moreno

If you are the only Global Administrator and you are completely locked out from the tenant. So, only Microsoft Support team can help you in this MFA issue. You might need to contact Microsoft via phone service number: Customer service phone numbers - Microsoft Support. The agent will be able to create a ticket for you under the affected tenant and then transfer this ticket to Data Protection team who could help you to regain access.  

• To connect directly with a real person when you call Microsoft support, the call must include the term AdminCenter, and the role must be specified as Global Administrator.
• In the description of the request, the term AdminCenter must also be mentioned.
• During the telephone dialog, if asked about another administrator, you can answer “no.” The call will then be forwarded to a real support agent, and a service request can be created.

If you cannot reach a real person via a support call, you can try to use a Trial Business Account to Submit a Ticket. Please visit the Microsoft 365 Business Plans and Pricing | Microsoft 365 and click Try for free to set up a trial account.

Then, please sign into the Microsoft 365 Admin Center using your trial tenant admin account > Choose Help & Support (at the bottom right side).

If you decide to use the trial account option, please make sure to cancel the subscription once your issue is resolved to avoid any unexpected charges.

And please understand that we're not Microsoft support, this is a user-to-user support forum. Moderators have no backend access and cannot directly intervene in Microsoft products. We provide only technical guidance and best-practice recommendations based on reported issues.

I hope this information helps and if you have any question, please feel free to ask via comment section,

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Answer 2

I am the only Global Administrator of a Microsoft 365 Business Basic tenant.

I accidentally removed the administrator account from Microsoft Authenticator and now I cannot complete multifactor authentication (MFA).

I have no alternative authentication methods configured and I am locked out of the Microsoft 365 admin center.

I still know the username and password, but I cannot pass the MFA step.

I need assistance from Microsoft Data Protection / Tenant Recovery to reset MFA for the administrator account or help me recover access to the tenant.

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References:

• Troubleshoot sign-in issues and account access problems
• Preventing tenant lockouts
• Tenant access recovery
• Common problems with two-step verification for a work or school account
• Mandatory multifactor authentication for Azure and admin portals
• About administrator roles in the Microsoft 365 admin center
• Global Admin Locked out - Microsoft Q&A
• Severity A Situation - Locked out of global admin account (MFA) - business down - Microsoft Q&A
• Requesting a Tenant Admin MFA Reset - Microsoft Q&A
• I need to reset my mfa methods - Microsoft Q&A
• Microsoft authenticator sending me into a spiral - Microsoft Q&A