Unable to Access Microsoft 365 Tenant Due to MFA Issues

Maurizio Accardo 6 Reputation points
2025-02-04T14:42:56.94+00:00

I have a Microsoft 365 tenant and am the sole administrator. Recently, I lost access to my account after deleting the Microsoft Authenticator app. I urgently need assistance.

I enabled multi-factor authentication last October, and everything functioned correctly until I changed my iPhone at the end of November or early December.

Additionally, I have not created any emergency access account (break glass) in Azure AD.

I have been unable to access my Azure account for over a month now.

Microsoft Authenticator
Microsoft Authenticator
A Microsoft app for iOS and Android devices that enables authentication with two-factor verification, phone sign-in, and code generation.
8,061 questions
Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
23,261 questions
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  1. Navya 15,465 Reputation points Microsoft Vendor
    2025-02-05T02:02:38.4+00:00

    Hi @Maurizio Accardo

    Thank you for posting this in Microsoft Q&A.

    I understand you're having trouble accessing your Microsoft 365 tenant. It sounds like you lost access to your account after deleting the Microsoft Authenticator app and you have not created any emergency access account in Microsoft Entra ID/Azure AD.

    If you are the only global admin on the account and are blocked entirely, you can reach out to our support team. You can look into below article to get support numbers depending on your country.

    https://support.microsoft.com/en-us/topic/global-customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2

     or creating a ticket through a different account:  https://learn.microsoft.com/en-us/microsoft-365/admin/get-help-support?view=o365-worldwide#online-support

    While creating a ticket with Microsoft support team. Give them the tenant ID which is locked out in your description. Tell them that no admin account has access anymore and your partners also have no access anymore.

    Once you create a ticket with support team you will have to work with our data protection team. You will have to first prove your identity against your tenant for security purpose. Post that this team will help you with help you in getting access to your tenant or unlock your account depending on your scenario.

    Hope this helps. Do let us know if you any further queries.

    Thanks,

    Navya.


    If this answers your query, do click Accept Answer and Yes for was this answer helpful. And, if you have any further query do let us know.

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