i want to change my email address for my xbox live account, can I change it on xbox.com or do i have to do it on my xbox 360? Thanks
Yes you would need to do it on the console see the article below for steps.
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You can change the email address tied to your Windows Live ID on the web, just not at xbox.com.
Go here account.live.com/summarypage.aspx and it is the very first option on the list.