Originally found in Cooking Light 1995, page 130. There is a companion recipe (Spicy Ham-and-Bean Soup) that uses the leftover ham. I don't know which my family likes better, the ham or the soup I make the next day.
Trim fat and rind from ham. Score outside of ham in a diamond pattern. Place ham on rack coated with cooking spray, and place rack in a shallow roasting pan.
Combine 1/4 cup maple syrup, 2 tablespoons mustard, orange rind, and orange juice; stir well, and brush over ham.
Bake at 425 degrees for 5 minutes. Reduce oven temperature to 325 degrees and cook an additional hour and 30 minutes or until thoroughly heated. Baste ham with maple syrup mixture every 30 minutes. Transfer ham to a platter and let stand 15 minutes before slicing.
Combine remaining syrup, remaining mustard, and marmalade in a small saucepan. Cook over medium heat 3 minutes or until thoroughly heated, stirring constantly.