Email Change

I guess you're talking about security proofs, right? Are you trying to add you're existing gamertag as a proof? In that case you would get that message. You have to add a different e-mail address, in case you ever have to prove your identity. More onfo on
the subject can be found here:

support.xbox.com/.../security-proofs

Hello ChaoticPrice! I do apologize for any inconvenience this has caused you. Here is a link to an Xbox Support page on how to change your Microsoft Account (E-Mail)

support.xbox.com/.../manage-microsoft-account

I hope this helps!

Maybe.

However, you need to have the password for the old Microsoft Account (i.e.,, the email addresse) before you can change it on the console.

yeah man,

Just create another microsoft account-you can go to account.live.com to do this.

After that get on the xbox-sign in with your profile-on the dashboard go to the right to settings-choose profile-choose account security-choose change microsoft account.

In order to do this it will ask you for the current email address and password and then the email address and password of the new microsoft account.

after that you should be good to go.

Hello! If you would like to just change your Microsoft Account email, login at account.live.com and click change under your email. If you would like to transfer your Gamertag to another Microsoft account, click here (support.xbox.com/.../switch-gamertag-to-different-microsoft-account)