Preheat oven to 325° F. Place ham in large roasting pan. Pour apple juice over ham. Cover ham completely with parchment paper, then cover ham and roasting pan completely with heavy-duty foil, sealing tightly at edges of pan.

Bake ham until instant-read thermometer inserted into center of ham registers 145° F, about 3 hours 45 minutes. Remove ham from oven. Increase oven temperature to 375° F.

Remove foil and parchment from ham. Drain and discard liquids from roasting pan. Cut off rind and all but 1/4-inch-thick layer of fat from ham and discard. Using long sharp knife, score fat in 1-inch-wide, 1/4-inch-deep diamond pattern. Spread mustard evenly over fat layer on ham. Pat brown sugar over mustard coating, pressing firmly to adhere. Drizzle honey evenly over.

Bake until ham is well glazed, spooning any mustard and sugar glaze that slides into roasting pan back over ham, about 30 minutes. Transfer ham to serving platter; let cool at least 45 minutes. Slice ham and serve slightly warm or at room temperature.

Position 1 rack in top third and 1 rack in bottom third of oven and preheat to 450° F. Combine 4 1/2 cups flour, baking powder, and salt in large bowl; whisk to blend. Add butter cubes and rub in with fingertips until mixture resembles coarse meal. Add cream and half-and-half and stir just until mixture is moistened and begins to clump together.

Turn out dough on floured work surface. Knead gently just until dough holds together, adding more flour by tablespoonfuls if dough is very sticky, about 6 turns. Roll out dough to 1/2-inch thickness. Using tines of fork dipped into flour, pierce dough all the way through at 1/2-inch intervals. Using 2 3/4- to 3-inch-diameter biscuit cutter or cookie cutter dipped in flour, cut out dough rounds. Transfer dough rounds to 2 ungreased rimmed baking sheets, spacing 1 inch apart.

Bake biscuits until light golden brown and tester inserted into centers comes out clean, rotating baking sheets halfway through baking, about 14 minutes total. Transfer biscuits to cooling racks and cool slightly.