The name does work on my LAN except when I have a VPN connection to somewhere else.

I am using a VPN created in Win 10 Settings> Network and Internet > VPN

I have Access to my router. I see the Port Forwarding Rules. What would I need to do?

I have a local server where the Server name is setup with the server IP address.
I can ping the server name or the IP address from my Win/10 PC.
I also connect to several other companies using a...