MFA & Verification Issues

How to Regain Access to Microsoft 365 Admin Account Without MFA Devices

Maira Mehtab Sep 21, 2026 869 views

Question details

The sole Microsoft 365 administrator cannot sign in because the phone and laptop previously used for the Microsoft Authenticator app were lost.

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to log into a Microsoft 365 administrator account after replacing a lost phone and restoring the Authenticator app.
Observed behavior: The sign-in process still requires verification from the unavailable MFA method, completely blocking access to the admin account.

Before you start

Gather your company's billing details, subscription information, and alternative contact numbers before reaching out to support to expedite the identity verification process.

Solution 1Recommended

Contact the Microsoft Data Protection Team

Since you are the sole administrator and are locked out of MFA, only Microsoft Support can manually reset your authentication methods.

When the only global administrator for a Microsoft 365 tenant loses access to their multi-factor authentication (MFA) devices, self-service password and MFA resets will fail. In this scenario, intervention from the specialized Microsoft Data Protection team is strictly required.

Locate the Regional Support Number

Visit the official Microsoft 365 admin support contact page or the Global Customer Service phone numbers page to find the specific toll-free phone number for your region.

Call Microsoft Support

Dial the regional support number and specify to the automated system or agent that you are experiencing an admin lockout issue requiring the Data Protection team.

Complete Identity Verification

Provide the representative with your company name, billing details, registered telephone number, and active subscription information to securely verify your identity.

Reset Authentication Methods

Once your identity is verified, request the support team to clear your existing MFA sessions and reset the authentication method so you can register your new phone.

Verification Timeframe: The Data Protection team's verification process can take several days depending on the complexity of validating your business identity.

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Frequently Asked Questions

Can another user in my organization reset my MFA?

Only another user with Global Administrator privileges can reset MFA settings for other users. If you are the sole Global Administrator in the tenant, you must contact Microsoft Support for assistance.

What information is required by Microsoft Support for identity verification?

You will typically need to provide your company name, domain name, billing details, subscription information, and the alternate email address or phone number registered to your admin account.

How long does it take for Microsoft to reset my administrator account?

Account recovery through the Microsoft Data Protection team can take anywhere from a few hours to several days, as they must perform rigorous security checks to ensure the account recovery request is legitimate.

How can I prevent getting locked out of my Microsoft 365 admin account in the future?

It is highly recommended to set up at least two Global Administrator accounts, often referred to as a 'break-glass' or emergency access account, which uses a different verification method or does not rely on the same primary MFA device.

Login & Account Issues