Ok, not everybody liked the SM list from Canopy and yes cnMaestro does eventually tell you whom is down, but the AP and cnMaestro both do not tell you when an SM is switching between APs or in my recent case, couldnt tell me which SM was missing. If an SM de-reg's then all visibility is gone until it re-reg's. put a color dot beside the SM's in the monitor-Wireless list, green = registered, red = de-registered and after 5 mins then remove it.