Preheat oven to 325F. In a small saucepan, combine cranberry sauce and maple syrup. Cook mixture over medium heat until sauce is smooth, whisking frequently. Place ham on a rack in a shallow roasting pan. Insert meat thermometer into thickest part of ham. Bake uncovered for 1 1/2 to 2 hours or until thermometer registers 140F. Liberally baste ham with glaze during the last 45 minutes of baking time. Makes 24 servings.