How to verify identity if I don’t have access to my old phone number

There is no bypass for this sign-in protection.

If this is a personal Microsoft account:

1. On the sign-in screen, select I don't have any of these if the old phone number is the only verification option.
2. Follow the prompts to recover the account or add new security info.
3. If Microsoft asks to verify that you can receive a security code, verify or add new security info. This can be skipped for 24 hours at a time, but after seven days from the first notice, verification is required before sign-in continues.
4. If prompted with Let's protect your account or Help us secure your account, an alternate email address or phone number can be entered. It does not have to be the account owner’s own email or phone, but it must be accessible to receive the verification code.
5. After access is restored, go to the Microsoft account Security tab, select Manage how I sign in, then choose Add a new way to sign in or verify to add the new phone number or another verification method.

If none of the listed methods are accessible, use the account recovery flow: recover your account.

If this is a work or school account:

1. On the sign-in page, select I don't have any of these if that option is shown.
2. If the account is still locked to the old number, contact the organization’s Help desk or Microsoft 365 admin to clear or update the verification settings.
3. If the device was lost or stolen, Microsoft recommends signing in with a different method or asking the organization’s Help desk to clear the settings.

Important:

• Microsoft support agents are not allowed to send verification codes or change account details.
• Do not respond to verification codes that were not requested.
• Avoid changing all security info at the same time, because the account may be restricted for 30 days.

References:

• Troubleshoot Microsoft verification code issues
• Microsoft account security info & verification codes
• Help us secure your account
• Common problems with two-step verification for a work or school account