Go to Security settings, and sign in with your Microsoft account.
If you’re asked to enter a security code to continue, and you can’t get that code, choose I don't have any of these or I can't verify my account from the drop-down list, then follow the instructions to reset your security info.
On the Security settings page, your security info is under Security info helps keep your account secure. Choose Remove for any you want to remove. You may be prompted to add new security info before you can remove the old info.
If you remove all of your security info, there’s a 30-day wait during which we help protect sensitive parts of your account so nobody can change your security settings or use your payment options. During this period you can still use your email, Skype, OneDrive, and devices as usual. After the 30 days, you’ll be notified that the wait is over and it’s time to enter new security info.
Security info & security codes
Email Microsoft support
Chat with Microsoft support