I've upgraded both my laptop and my desktop in my office to Windows 10 Pro (both were coming from Windows 8.1).

VPN was working perfect before the upgrade.

At current I can't establish a VPN connection to my office.

The VPN server (at my office) is listening to port 3390.
Checking with netstat and port scanner, the port (3390) is opened.

On the VPN client I'm typing server IP:3390 but getting an error message saying "the remote connection was not made because the name of the remote server did not resolve).

Using just my server IP, I'm getting "verifying your connection info", and then "connecting to server IP".... and.. nothing more. It never connects.

Any help would be very appreciated.