Microsoft account no longer valid

I had an old college email address (*** Email address is removed for privacy ***) that I used for xbox live for years (Since the xbox 360 first came out) and I graduated and GSU deactivated the account. Now my xbox live information is not valid when I am attempting to login to live.com, There was not a secondary email address attached to the account. My 360 was working fine for xbox live but recently with some new security updates it no longer allows me in and asks for a password. The password that I previously used does not work. I am stuck and not able to get into my account.