Changing Default VPN listening/connecting port

I need to change the listening port for VPN connections of a PC to something
other than 1723. I found and modified the tcpport entry of the default 1723
in the registry on the server machine to the desired port. I've opened the
appropriate ports on the router and forwarded them to the appropriate server
IP. On the client side, how do I change the connection port? I tried using
the format "domain.addressort" in the VPN setup wizard, but could not
connect.

TIA for your assistance