MFA & Verification Issues

Recover Microsoft 365 Global Administrator Account with Lost MFA

Partner Editor Oct 12, 2026 869 views

Question details

The organization needs to restore access or reset the multifactor authentication (MFA) for a Microsoft 365 Global Administrator account that is sending codes to an unknown phone number.

Recover a Microsoft 365 Global Administrator Account with Lost MFA Access

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to sign in to the Microsoft 365 admin center but blocked by an MFA prompt directing codes to an inaccessible or unknown phone number.
Observed behavior: The organization cannot sign in to the Global Administrator account, preventing access to administrative functions because the MFA codes cannot be received.

Before you start

Check if there are any other Global Administrators within your organization who can log in to the admin center, as they have the permissions to reset your authentication methods. Also, gather your company's subscription and billing details to verify account ownership if you need to contact support.

Solution 1

Reset MFA via Another Global Administrator

If your organization has multiple admin accounts, another administrator can easily reset your authentication methods from the admin center.

This is the fastest method to regain access. It relies on the best practice of having at least two Global Administrators assigned to a Microsoft 365 tenant to prevent lockouts.

Sign in to the Admin Center

Have the other Global Administrator sign in to the Microsoft 365 admin center using their credentials.

Navigate to Active Users

In the left navigation menu, go to 'Users' and then select 'Active users'.

Select the Locked Account

Find and click on the Global Administrator account that is locked out to open the account properties panel.

Manage Authentication Methods

Click on 'Manage multifactor authentication', select the user, and click 'Require selected users to provide contact methods again', then save the changes.

Solution 2Recommended

Contact Microsoft Business Support

If you are the only Global Administrator and cannot bypass the MFA prompt, you must contact Microsoft support by phone to verify your identity and have the Data Protection Team reset your access.

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Frequently Asked Questions

How long does it take for Microsoft Data Protection to reset my MFA?

The process varies but typically takes between a few hours to several days. Because Global Administrator accounts hold the highest security privileges, Microsoft must thoroughly verify your identity before granting access.

Can I bypass the Microsoft 365 MFA if I lose my phone?

No, you cannot bypass the MFA prompt for a Global Administrator account. You must either use an alternative authentication method you previously set up (like an alternate email or phone number), have another admin reset it, or contact Microsoft phone support.

Why are my MFA codes going to an unknown phone number?

This usually occurs if the phone number was entered incorrectly during initial setup, the account was set up by a former employee using their personal device, or in rare cases, the administrator account has been compromised.

What happens if I cannot verify my billing information with Microsoft Support?

If you cannot prove ownership through billing or subscription details, Microsoft may require alternative proofs, such as adding a specific TXT record to your organization's domain DNS settings to prove you control the domain.

Login & Account Issues