Thanks to a post on Reddit, it looks like Microsoft is gearing up for a self-service refund program for digital purchases made via the Xbox One or Windows 10 stores. Microsoft has since confirmed to the folks at Polygon that the program is indeed real and is undergoing pilot testing for those in the Xbox and Windows Insider Programs, but presumably it should roll out to more users at a later date once all the kinks have been worked out.
According to the policy, which may change later, this only applies to games and apps that have been purchased within the last 14 days. There also needs to be less than 2 hours of play time across all accounts, so it’s not as if you can play the game non-stop on request for a refund on the 14th day.
This refund will not apply to DLCs, season passes, or add-ons. Refund requests can only be made after the app/game has been launched at least once, and customers must wait for at least one day after the app/game’s release before requesting refunds.