MFA & Verification Issues

How to Reset Microsoft 365 MFA After Losing Access to Phone

Huda Qurayshi Sep 30, 2026 869 views

Question details

The user needs to bypass or reset multifactor authentication for a Microsoft 365 mailbox because the linked phone number is no longer accessible.

How to Reset Microsoft 365 MFA Without Your Phone

Product: Microsoft 365
Device & OS: not provided
Scenario: Attempting to log into a Microsoft 365 mailbox protected by an MFA method (a former colleague's phone) that is no longer available.
Observed behavior: The user is locked out of the portal and cannot reset the password or bypass the MFA prompt without the verification code sent to the inaccessible phone.

Before you start

Gather your organization's IT support contact information or, if you are the tenant administrator, prepare your tenant and account ownership verification details before reaching out to Microsoft.

Solution 1Recommended

Contact Your IT Administrator to Reset Authentication Methods

Since MFA cannot be bypassed locally by the user, standard users must request an MFA reset from their organization's admin.

Multifactor authentication is a strict security measure designed to protect organizational data. It cannot be bypassed from the user login screen. The most direct solution is to have an administrator reset your required verification methods.

Identify your IT Admin

Contact the IT department or the designated Microsoft 365 administrator for your organization.

Request an MFA Reset

Explain that you have lost access to the phone number associated with your account's MFA.

Admin clears the old method

The administrator will log into the Microsoft Entra admin center, locate your user profile, and select 'Require re-register MFA' or manually remove the old phone number.

Set up new MFA

On your next login attempt, you will be prompted to set up a new multifactor authentication method using your current device.

Contact Your IT Administrator to Reset Authentication Methods

Security Protocol: Administrators may require you to verify your identity through an alternative channel before resetting your MFA settings.

Solution 2

Contact Microsoft Support (For Sole Administrators)

If you are the only global administrator and are locked out due to MFA, you must contact Microsoft Data Protection for account recovery.

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Frequently Asked Questions

Can I bypass Microsoft 365 MFA if I don't have the phone?

No, Microsoft 365 MFA is a strict security measure that cannot be bypassed by the user. If you lose access to the verification method, you must contact your IT administrator to reset your authentication settings.

What happens if I am the only admin and lose my MFA device?

If you are the sole global administrator, you cannot reset it yourself. You must contact Microsoft Business Support or the Data Protection team and verify your identity to regain access to the tenant.

Where does an IT admin go to reset a user's MFA?

Administrators can manage and reset user authentication methods by accessing the user's profile within the Microsoft Entra admin center (formerly Azure Active Directory) and selecting the option to require re-registering MFA.

Login & Account Issues