MFA & Verification Issues

How to Sign In to Microsoft After Changing Verification Phone Number

Maira Mehtab Sep 20, 2026 868 views

Question details

The user is unable to sign in to their Microsoft account because their identity verification phone number has changed, and they can no longer receive security codes sent to the old number.

Product: Microsoft Account
Device & OS: not provided
Scenario: Attempting to sign in with multi-factor authentication (MFA) after switching to a new phone number without updating the account settings first.
Observed behavior: Sign-in is blocked because the verification code is sent to an old, inaccessible phone number, leaving the user locked out of their account.

Before you start

Gather any alternative recovery methods you previously set up, such as an alternate email address or a saved recovery code, to speed up the account recovery process.

Solution 1Recommended

Update Security Info via Account Recovery (Personal Accounts)

Use Microsoft's standard account recovery procedures to bypass the old phone number and update your security information.

If you are using a personal Microsoft account (like @outlook.com or @hotmail.com), you must go through the automated recovery process to prove your identity and replace the old verification number.

Initiate Sign In

Go to the Microsoft sign-in page and enter your email address and password.

Select Alternate Verification

When prompted to verify your identity with the old phone number, click on 'I didn't get a code' or 'I don't have any of these'.

Provide New Contact Information

Follow the on-screen instructions to enter a new email address or phone number where Microsoft can reach you.

Complete the Recovery Form

Fill out the account recovery form with as much accurate information as possible (previous passwords, email subjects, etc.) to prove ownership.

30-Day Security Hold: Replacing all security information on a Microsoft account triggers a mandatory 30-day waiting period before the new phone number is fully active.

Solution 2

Request Administrator Reset (Work or School Accounts)

For organizational accounts, contact your IT administrator to update your contact information in the Microsoft 365 admin center.

Solution 3

Contact Microsoft Support

Reach out to Microsoft Support directly if automated recovery fails and you are still unable to verify your identity.

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Frequently Asked Questions

How long does it take to update my Microsoft security info?

If you lose access to all your security methods and need to replace them, Microsoft imposes a strict 30-day waiting period. During this time, you can still access your emails on trusted devices, but you cannot change security settings.

Can I bypass phone verification if I know my password?

No. If you have two-step verification enabled, having just the correct password is not enough. You must use an alternate authentication method (like a recovery email or authenticator app) if your phone is unavailable.

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

It is highly recommended to set up at least two or three different recovery methods. You can add an alternate email address, use the Microsoft Authenticator app, and generate a 25-character recovery code to store in a safe place.

Login & Account Issues