MFA & Verification Issues

How to Recover a Microsoft Account Requesting an Unknown Security Code

Maira Mehtab Sep 22, 2026 869 views

Question details

The user is unable to log in because the account recovery process requests a security code sent to an unknown email or phone number, or the system states the email address does not exist.

Product: Microsoft Account
Device & OS: not provided
Scenario: Attempting to sign in to a Microsoft account or recover an account password.
Observed behavior: The sign-in screen either asks for verification via an unrecognized security contact method or displays an error stating that the email address associated with the account does not exist.

Before you start

Make sure you are using a trusted, secure device to perform the recovery steps and gather any alternate email addresses, phone numbers, or old passwords previously associated with your account.

Solution 1Recommended

Use the Microsoft Account Recovery Page

If your alias was changed or you don't recognize the recovery information, you must submit a recovery form using all known historical account details.

When an account is compromised, attackers often change the primary alias and the recovery email or phone number. Using the official recovery form is the primary method to prove ownership.

Navigate to account recovery

Go to the official Microsoft account recovery page (account.live.com/acsr) on a secure browser.

Enter known details

Input your original email address, phone number, or Skype name, even if you received a message saying it does not exist.

Provide a contact email

Enter a different, accessible working email address where Microsoft support can contact you regarding your recovery request.

Fill out the recovery form

Provide as much accurate information as possible, including old passwords, recent email subjects, or billing information linked to the account.

Important: Submit the form from a device and location (like your home Wi-Fi) that you frequently used to sign in to the account previously to increase your chances of successful recovery.

Solution 2

Secure Your Windows PC and Local Data

If your Microsoft account is linked to your Windows login, you need to ensure your local data is safe and your device is not infected.

Solution 3

Contact Microsoft Account Support

If automated recovery fails, you may need to escalate the issue through Microsoft's direct support channels.

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Frequently Asked Questions

Why does Microsoft say my email address does not exist?

This usually happens if your account was compromised and the attacker deleted your email address from the account by changing the primary alias. You will need to use the Microsoft account recovery form to try and restore it.

What should I do if the recovery form is repeatedly rejected?

Ensure you are filling out the form from a recognized device and network. If it continues to be rejected, try to recall older passwords, Xbox Live hardware IDs, or recent email subjects. You can submit the form up to two times a day.

Can I bypass the unknown security code request?

No, you cannot bypass the security code if multi-factor authentication or an unrecognized contact method is set up. You must select 'I don't have any of these' on the verification screen to trigger the 30-day security information replacement process, provided you still know the password.

How do I log into Windows if I am locked out of my Microsoft account?

If your PC is connected to the internet, it will require the new credentials. Disconnecting your PC from the internet might allow you to log in using the last known good password cached on the device. Once logged in, immediately create a local admin account.

Login & Account Issues