Hi Apilion! We actually have added something similar in and you'll find that in beta currently. Under Settings>Connectivity you'll find a Synchronized Devices and Authenticated IPs card that displays this information. From the administrator side the same information can be found in similar interfaces that we've added or improved. I hope that helps!
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com