Locate the "Services and Subscriptions" tab at the top of the page — this will showcase which subscriptions you currently have on your account.
Now, once you've extended your Xbox Live Gold subscription to the desired length, it's finally time to add the "One month of Xbox Game Pass Ultimate for $1" deal to your account.
Click Join, on the next page Click Continue and then on the following page agree to billing info
Your current Xbox Live Gold subscription should now be converted to Game Pass Ultimate and will be available for the length of your Live Gold subscription. You Can Verify this under Services and Subscriptions Tab on your Microsoft account page.
You may Turn Off Recurring Billing for Game Pass Ultimate here by Clicking "Manage" just to the right of the billing information.
What does Xbox Game Pass Ultimate Subscription Offer?
Over 100 high quality games to play on Xbox One, with new ones being added all the time.
Over 100 high quality games to play on Windows 10 PC, with news games added all the time
Day and date access to Xbox Game Studios releases
Up to four free monthly Games with Gold titles on Xbox.
Xbox Live Gold, the most advanced online multiplayer network.
Early access to some of our biggest sales of the year.
