Leftover glazed ham can be stored in an airtight container in the refrigerator for up to 3-4 days. Alternatively, you can freeze leftover ham for longer-term storage. To freeze, wrap the ham tightly in plastic wrap or aluminum foil and place it in a freezer bag or container. Frozen ham can be stored for up to 2-3 months. When ready to use, thaw the ham in the refrigerator overnight before reheating.