Preheat the air fryer to 320 degrees.
Remove ham from the package. Place ham in the base pan or dish. If you are using the basket with holes, you will probably want to line it with a piece of foil to catch the juices. 
Use a spatula to fully coat the top of the ham with the Dijon mustard. 
Next, rub it with the brown sugar.
Pour the honey over the top. Add the balsamic vinegar and the apple juice, pouring it right over the top of the ham as well. 
Turn the ham so it fits in the pan flat, and the air fryer lid will close comfortably without touching the ham. 
Cook it for about 40-45  minutes. Check the temperature of the ham with a meat thermometer. 
Ham should reach an internal temperature of 145 degrees when fully cooked up to temp.  
Remove from the air fryer & serve.