MFA & Verification Issues

Fix Microsoft Account Cannot Replace Old Phone Number

Maira Mehtab Sep 29, 2026 869 views

Question details

The user is unable to access their Microsoft account security information to update an old phone number, resulting in a persistent identity-verification loop.

How to Fix Cannot Access Microsoft Account Security Info or Replace Old Phone Number

Product: Microsoft Account
Device & OS: not provided
Scenario: Attempting to update account security methods or pass MFA but lacking access to the registered outdated phone number.
Observed behavior: The user becomes stuck in a repeated 'Verify Your Identity' loop because they cannot receive the verification code on their old phone number.

Before you start

Determine whether you are trying to recover a personal Microsoft account (like @outlook.com) or a work/school account, as the recovery processes and administrative requirements differ significantly.

Solution 1Recommended

Replace Security Info for a Personal Microsoft Account

Use this method if you are locked out of a personal Microsoft account due to an old phone number and need to register a new one.

If you remove all previous security information and replace it with new information, Microsoft will place your account in a restricted state for 30 days to protect your data.

Go to the verification screen

Select the missing info option

Click on 'I don't have any of these' or 'Sign in another way' to initiate the account recovery and security update process.

Follow the prompts

Follow the on-screen instructions to replace your outdated security information with a new, accessible phone number or alternative email address.

Replace Security Info for a Personal Microsoft Account

30-Day Restriction Period: During the 30-day waiting period, you can still access most Microsoft services, but you will not be able to change your password or manage sensitive security settings.

Solution 2

Update Authentication Methods for Work or School Accounts

If your account is managed by an organization, you must request an administrator to reset your MFA settings through the Microsoft Entra admin center.

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Frequently Asked Questions

Why is my Microsoft account restricted for 30 days after changing my phone number?

When you replace all your security information, Microsoft enforces a 30-day waiting period to prevent unauthorized access in case your account was compromised by a malicious user.

Can I bypass the identity verification loop if I don't have my old phone?

For personal accounts, you must select 'I don't have any of these' to initiate the security info replacement process. You cannot bypass the verification immediately without an alternative backup method already registered.

What if I am the only admin for my Microsoft Entra tenant and am locked out?

If you are the sole global administrator and cannot pass the MFA prompt, you must contact Microsoft Support directly by phone to verify your identity and regain access.

Does replacing my phone number affect my email access?

For personal accounts, you can usually still access your Outlook email during the 30-day restriction period, but you cannot access sensitive security settings or change your password until the period concludes.

Login & Account Issues