If the VPN connection is already set up through the server, then setting up VPN for remote connection will be easy.
Here are the steps you can follow to do so:
1 .Plug in the machine on the primary network, hardwired to an ethernet cable.
2. Open a browser
3. Type http://(domain)/connect
4. Download connector
5. Type username and password
6. Finish setup
7. You are all done. You can now use the VPN off site anytime you like.