Combine brown sugar, cider vinegar, honey, cinnamon, nutmeg, paprika, cayenne & salt in a small bowl. Whisk to combine & set aside.
Place ham on a large piece of foil.
Drizzle about 1/4 of the glaze over the ham.
Close the foil around the ham to completely cover.
Place the ham in the air fryer basket.
Set the temperature to 320 degrees.
Cook for 15 minutes.
Remove the air fryer basket & carefully open just the top of the foil around the ham.
Brush the ham with more glaze, recover & cook another 5 minutes.
Repeat the last step another 3-4 times (with a total cooking time of 15-20 minutes after the initial 15 minutes in step 7).
Take care to not dry out the ham – making sure to recover each time you cook.
Remove & allow to rest 5 minutes before serving.