If you know your Microsoft account email address, you can skip this tutorial and reset your password now. If you need help with this process, follow the steps provided in Xbox support page's solution.
In order to access your Xbox Live account, you must know both the email address and password that you use to sign in to your Microsoft account. This solution will walk you through several options for recovering your account password.
Important If you’ve forgotten both your Microsoft account email address and your password, you should follow the steps to retrieve your email address first, and then follow the steps to reset your password. To find your account email address, see the Lost Account Solution and then return to this solution to reset your password.
Do you want to reset your password online, or by using your Xbox One or Xbox 360 console?
If you have lost or forgotten your Microsoft account password, you will need to reset it in order to create a new password. There are three options for resetting your Microsoft account password. You can request a password reset online, or you can use your Xbox One or Xbox 360 console.