If you know how impossible it is to find this link when you need it.
Valid for Windows XP & Windows 2003 Server

%windir%explorer.exe "hcp://CN=Microsoft%20Corporation,L=Redmond,S=Washington,C=US/Remote%20Assistance/Escalation/Unsolicited/Unsolicitedrcui.htm"

Server 2008

%systemroot%system32msra.exe