I have the Synology 218+ and am using Directv Now with TVE.
I notice that the history channel is missing from my lineup.
I've tried rescanning and then manually rescanning (via the edit link). But the History channel is just missing. (I have an older grandfathered Directv Now plan that includes History).
It just isn't listed in my list of available channels. (either in the correctly scanned list or the unavailable list)