My DirectAccess server is NAT'd. Following various documents, I have created firewall rules to forward ports 41, 443, 3544 but I'm thinking the problem isn't there.
At the moment I believe the problem may be on the DirectAccess server itself. I'm expecting to be able to see some type of page at the DirectAccess URL the clients use (NAT'd of course) at the local URL of https://192.168.1.50/IPHTTPS
Should I see some type of page using that URL as a test?