For servicing clients, I use RDP almost exclusively, usually with a private port forward at the router level but for 4 or 5 clients where we don't handle the network we use MS or Cisco VPN to make the connection. If we can't get cooperation from or they don't have any IT people, we have a Bomgar device but it can be slow and does not have printing features. We monitor a lot of client hardware via GFI Max and the ""Take Control"" feature works pretty good but I still prefer RDP. For Client remote end user use, we always use a terminal server for both MAS 90 and 200.