In order to change the password on your Xbox Account, you will need to follow these steps:

1. Go to your Microsoft Account.
2. Go to "Reset your password".
3. Enter and confirm your email address.
4. Choose where you’d like get a security code (email or phone number).
5. Once you receive your security code, you’ll be prompted to choose a new password and enter it twice.

Note: Passwords should be at least 8 characters long and should contain a mix of upper and lowercase letters, numbers, and symbols.