Go to microsoft store and add a 1200 point digital card to your cart. Then apply the coupon code XboxEMWAu2bb76nb8 to your cart. Seems to work multiple times. Lets hope these points transfer to the Xbone. The code does not seem to work for everyone.
Edit: Also, it took about an hour for my codes to show up.
Edit: Also, it took about an hour for my codes to show up.