Yes, this should work. There’s a program change transmit map and a MIDI CC transmit map. Neither of these two maps are in H9 Control though, but if you go through the MIDI preferences on the H9 itself when it’s in system mode, you’ll see them there.
I tried this set up mentioned above. Setting it up in System Mode. However its not changing presets from My aux Switch. Any Ideas why this wouldnt be working? I have the AUX switch set up to incriment and decrement presets on one H9 and also set up to xmt CC to another H9. my goal is to hit one button on Aux Switch and it increment preset on Both H9’s.