Update- Dear Forum Members, The issue with the digital version of Far Cry 4 on Xbox One has now been resolved. Thank you for your patience.
We are aware of an issue with accessing the digital version of Far Cry 4 on Xbox One (Error Code: 0x87de07d1 or "Do you own this game or app?"). We are currently working with Microsoft to identify the problem, and will update you with more information when it becomes available.