How to configure the new Sophos Connect VPN in 17.5

So far I have found the documentation lacking for setting up the new VPN client that comes with 17.5. Specifically in regards to the internal and external ID and what thats for.  I am also wondering with the IP range? Does it create the DCHP pool automatically? 

It would be great if there was a walkthrough on setup or if there were any more details. But I can't find any.