- Sign in to Xbox.com and go to the My Account section.
- Click the Membership level link on the left.
- You'll see a page that has your Membership level, and the end date. Under that, you'll see your "Automatic Renewal" status (as shown above).
- If it reads ON, users can click the ON link and be brought to a page to turn the feature OFF.
- If you'd like to change the setting to ON or OFF -- Click the link, make your selection, then click next.
- You'll be returned to your Membership level page, where you can confirm your selection
[Thanks, Juan]