I use RDP to connect to a Server12. It will work fine from the Win 7 Ultimate computer I use. I am setting up a Win 10Pro Enterprise computer (using the same hardware except for larger SSD hard drive). I am unable to connect from the new Win 10 setup, Hyper-V virtual Win 7pro, another Win 7Pro on my network , my Win 12 server or an Android app. I have disabled the Sophos UTM firewall on the remote system to test. I cannot find an error message in the event logs for any of the systems. The remote server does log"Listener RDP-Tcp received a connection" but nothing after that. If I use the incorrect credentials I get an authentication error but I don't see it logged. I have installed a new self signed cert. I am using a non-standard port but I use the same on my Server 12 and can remote in from anywhere. I have noticed that in the Sophos firewall log that the good connection results in first a TCP connection then a UDP. The incomplete connections do not have a UDP connection.
Any help would be appreciated.