Stretched LAN using OVPN

[sysoict]

Hi all :)

Im trying to achieve the following but cant find the right information.

I`ve a Windows server box in a datacenter which has only a WAN connection that I want to integrate in an existing LAN in our office over an OpenVPN tunnel.

The existing LAN has the range: 192.168.1.x

I want the server to be reachable via 192.168.1.200

The VPN tunnel itself is working fine, and I can ping to different machine in both directions, however the server is only reachable at the OpenVPN ip address (10.8.0.1)

The server is the VPN server, the PFsense at the office has been setup as client.

I only found guides to connect two PFsenses.