This option will synchronize the status of the current cache with Geocaching.com. You will be notified if any changes are made and what the change was. This feature supports Available, Temporary unavailable, and archived. It has been added to the waypoint menu so you can allocate a short cut key to it. You can run the menu option (or short cut) at any time.
To test this feature out, you could try manually setting the status of the cache to something that you know is different to the current online status
Note: This feature currently is not supported "Subscriber only caches"