Hi, I have a big doubt.
I have a virtual server installed into a physical server (obviously)
And I have Dynu System Dynamic DNS service installed in the virtual server.
Of course, it is working great to let me connect using the remote desktop software.

I am planning to install another Dynu System Dynamic DNS service, but it the physical server.

The virtual server is using 3389 port for RDP sessions. And I will configure 3390 port on the physical server for RDP.

Will this make a conflict?

Best Regards.

You can set up port forwarding in your router from port 3390 to port 3389 of the internal IP of the physical machine and use yourhost:3390 to access the physical machine.