Preheat oven to 250. Put the ham in a large baking dish. I cut the cross marks around both sides so the glaze would seep into the meat.
Make the glaze. Cook the sweetener and butter over medium heat until melted. Add the maple extract and orange oil. Brush ⅓ glaze on the ham immediately. Put 1 cup water in the bottom of the baking pan and cover the whole thing with foil. Bake for 4 hours.
Remove from the oven and brush ⅓ of the glaze on. Raise oven temperature to 300. Recover with the foil. Bake for 30 min.
Remove from the oven and brush the rest of the glaze on. Bake uncovered at 350 for 30 minutes. Make sure the internal temperature of the ham is at least 140 for a pre-cooked ham. Let rest for 5-10 minutes before slicing. We prefer big thick juicy slices to the thin ones from a spiral ham.