I have a windows 2019 server with RRAS configured as a vpn server to allow remote DIAL UP connections

Question

I have configured Rounting and Remote access configured in a windows 2019 server called dcprin.winsys.local that is also a dns server and a domain controller. This server is acting as a vpn server to allow other servers to get connected using Demand-dial connections by PPTP. Once a server is connected, dcprin.winsys.local assigns an ip to the servers (10.8.0.x) and when you configure the Demand-dial connection under Network Interfaces inside Routing and Remote Access in the clients you can add an static route to reach the vpn server by their internal ip (172.160.13.25). The issue is that you can ping from the clients dcprin.winsys.local by their internal ip 172.160.13.25 with no issues but you are not able to reach the client vpn server by their internal ip, you are able just to reach the client server by the ip assigned by dcprin.winsys.local (for example 10.8.0.12) and not by their internal ip. I need to reach the client vpn by their internal ip and not by the ip assigned by the configuration of RRAS in dcprin.winsys.local.