Enter the email address, phone number, or Skype ID you used when you made your Microsoft account. This could be any email address, or an email ending in a Microsoft domain like hotmail.com or outlook.com.
If you have security info on your account, we'll send a one-time code to the alternate phone number or email address you gave us. After you enter that code on the next screen, you'll be able to make a new password.
Enter your new password, then select Next.
More information can be found here on the microsoft support website.