Tenant lockout – only Global Admin lost MFA device (Authenticator)

Question

* I am the only Global Administrator in our Microsoft Entra (Azure AD) tenant.
* MFA is required and the only registered method was Microsoft Authenticator on a lost/reset phone.
* I cannot sign in to Entra/Azure/M365 admin portals to reset security info.
* Request: Please escalate to Microsoft Support Data Protection to verify ownership and reset MFA registration.

Public (non-PII) details:

* Tenant primary domain: example.com
* Tenant region/country: [your country]
* I can provide the affected Global Admin UPN and contact details via private message.

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Moved from: Microsoft 365 and Office | Subscription, account, billing | For business | Other

Answer 1

Hi Chantal,

In this case you need to call up the support desk and provide the identity proof as the Data Identification team will cross check the details you provide with the account - https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2

Hope this helps.

JS

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