MFA & Verification Issues

How to Recover Microsoft Account After Changing Phone Number and Losing MFA Codes

Maira Mehtab Sep 28, 2026 869 views

Question details

The user needs to regain access to their Microsoft account after changing their phone number and losing access to their primary two-step verification method.

Product: Microsoft Account
Device & OS: not provided
Scenario: The user is attempting to sign in but is prompted for an MFA code sent to an old, inaccessible phone number.
Observed behavior: The system continuously sends verification codes to the outdated phone number, completely blocking the user from completing the login process.

Before you start

Check if you are still signed into your Microsoft account on another trusted device or browser, as this may allow you to bypass the prompt and update your security settings directly.

Solution 1Recommended

Use an Alternative Verification Method

Use this method if you previously set up a backup email address or secondary authentication method on your Microsoft account.

If you have multiple verification options configured, you can bypass the SMS code requirement by selecting a different method during the login process.

Choose an alternative sign-in option

On the sign-in screen, when prompted for the verification code, click on 'Sign in another way' or 'I didn't get a code'.

Select your backup method

Choose your backup email address or secondary phone number from the list to receive the verification code.

Update your security info

Once signed in, navigate to the Security settings page, remove the old phone number, and add your new phone number or register the Authenticator app.

Update Successful: Adding an authenticator app as your primary method is highly recommended to avoid SMS delivery issues in the future.

Solution 2

Contact Your Organization Administrator

If you are using a work or school account and have no alternative verification methods, your IT admin must reset your MFA.

Solution 3

Contact Microsoft Support for Locked-Out Admins

Use this path if you are the sole administrator for your organization's Microsoft tenant and have been locked out due to an MFA phone change.

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Frequently Asked Questions

What happens if I don't have any alternative verification methods?

For personal Microsoft accounts, if you cannot verify your identity, you will need to fill out the Microsoft Account Recovery form. Once submitted, it may trigger a mandatory 30-day waiting period to replace your security information.

Can I transfer the Microsoft Authenticator app to my new phone without the old one?

If you turned on cloud backup for the Authenticator app on your old phone, you can recover your credentials on the new device. If you did not, you will need to re-register the app using an alternative verification method or ask your IT admin to reset it.

How can I prevent getting locked out by MFA in the future?

Always maintain at least two or three different verification methods on your account (such as an alternate email, the Authenticator app, and a secondary phone number). For business admins, it is highly recommended to set up a 'break-glass' emergency access account.

Login & Account Issues