If you put your gift card money into your Microsoft account and want to spend all of it, here's how.
Add another payment method to your Microsoft account, like a credit card or PayPal.
On your PC or Xbox (Windows Phone doesn’t allow this yet), buy something in Store that costs a little more than what’s in your Microsoft account balance.
This will use up all your gift card money, and any difference will be paid with your new payment method.
Article ID: 4027158 - Last Review: Aug 11, 2017 - Revision: 1