Although you can not see who is invisible on MSN through the client's "official" Microsoft (Windows Live Messenger), recent changes made to the protocol of this network allow other IM clients developed by third parties may view if our contacts that are seemingly disconnected, in fact if they are but with the status "Invisible" or "not connected".
In short, those who are users of other alternative customers for the network Emesene MSN, aMSN, Kopete or Pidgin can see who is to Not Connect to the MSN, obviously without the need to install plugins or make changes rare.
Making a fairly logical deduction, if you're Windows Live Messenger and want to see who is invisible on Messenger the option is that you use a client for MSN that offers this feature, as the Emesene. It should be noted that most such customers were created for Linux but also offer versions for Windows.
But it is also worth mentioning that both aMSN, Kopete and Pidgin can see who is as Offline on MSN alone in its versions for GNU / Linux, while Emesene can do it in all its versions (Windows and Linux).
So, if you are Linux user you might want to install in OpenSuse Emesene or, Crazy Emesene install Ubuntu 9.04. Similarly, if a Windows user can download this client version for your operating system from their official site.
