It may be too specific to your setup but as there are many Samsungs using this, we hope for the best.
That is, place your question where it's most likely to get answers from maker and users.
Does anyone know if a Harmony Companion remote can be used with a Samsung UN65JU7500 tv to access apps in the Smart package like MLB.tv? I do have MLB.tv app and it works fine. Using the Samsung remote that came with the tv is a pain so I purchased Harmony Companion. The instructions for setting up a "Smart tv activity" ask for what input the smart app uses???