Question about Outlook Express

Trying to my reset the password to my sons gamer tag / xbox account that was mistakenly created with an email address using a .con sufix instead of a .com

I fill out the form and eventualy get this email;

Thank you for your request. Your Microsoft account **email**.con was created using an email address from a provider other than Microsoft. To reset your password for this account, follow these steps:
Click Here for the Microsoft account password reset page.
Select an option and click "Reset your password".
Enter your Microsoft Account, then enter the security characters, lastly click "Next".
On the following page, select "Email me a reset link" and then click "Next".
A reset link is now sent to your email address.

Then I get to the 'reset your password page' and it only lists the email address with the .con sufix and not my gmail address that is also on the account.

This means the account reset is never being sent to an accessable email address.

How do I get the reset page to show all email addresses associated with the gamer tag / user account?