Can connect to VPN but can't access connected PC

So I've scoured the web and pulled together enough info to enable me to create an incoming VPN connection on our dedicated P2P file "server" which runs Windows 8.1 Pro. On my Windows 10 Pro laptop, I've also created an outgoing VPN connection to the server. When I click the "Connect" button in "Network and Internet" Settings, the connection is established immediately with no error messages and a resulting status of "Connected". On the server side, the incoming connection also shows connected. Sounds like success, but no matter what I try, I can't find a way to actually access any of the drives/files on the server. I expected the server to show up in the list of "Network" computers, thereby enabling me to map a drive to the shared folder(s), but no such luck. I made sure when I was creating the incoming connection on the server that I enabled "File and Printer Sharing", as well. Also, FYI, the server's WAN connection is on a static IP, and I've done the necessary port forwarding to the server's internal IP address. The one especially odd thing is that when I view the connection details on my laptop, it shows a subnet address of 255.255.255.255, and I don't have a clue whether or not that's correct. There's oddly little information that I can find that describes all of the possible entries that are required in the many and various dialogues that are presented while trying to setup the VPN.

Any ideas/schooling that anyone can provide would be very much appreciated.

Inasmuch as I've had no replies to this message in five days, I wonder if anyone could suggest an additional networking forum where I could post, that might have a little more knowledge about VPNs?

TIA for any suggestions.