There is a persistent, recurring problem going on as of late with the gradual migration of Xbox One's OS to Windows 10. In the past month there have been five updates, and in at least three of them it makes Destiny "forget" you actually have purchased content/expansions, locking your access with Trial Mode permanently.
Earlier today I managed to get it working with a forced reboot, but had to do the same thing tonight because it went back into Trial Mode again... I realise that I am on the Preview Program, but have read threads on Bungie.net who aren't, encountering the same issue when they shouldn't be.
I'd hate to find come November that Destiny is incompatible with my console!