I am deploying Skype for Business 2015 Server Standard on one virtual machine. In other words, all roles are on one Windows Server 2012 R2 machine.
Inside the firewall, Skype works. I can share desktop, I can chat.
Outside, it will not connect. I use Microsoft's Remote Connectivity Analyzer and autodiscovery works and the certificates are good. It then doesn't connect.
I have verified that the appropriate ports have been allowed through the firewall. I have a 1:1 NAT.
The server has one and only one internal IP address, 10.0.10.44.
When I get to the Edge configuration,

Why doesn't this work?