We use OpenVPN for our VPN clients coupled with DirectAccess for transparent domain access on Windows 8.1. If I boot a client it connects to DA and everything works as it should. When I connect to OpenVPN on the same client, DA immediately changes to a "Connecting ..." state and stays there, even after I disconnect from the VPN.
If I run a netsh interface httpstunnel show interface it shows a0x274c failed to connect to the IP-HTTPS server. Waiting to reconnect.
The DirectAccess Client Troubleshooter fails at the IP Connectivity, Infrastructure Tunnel, and User Tunnel Tests.
However, I can access the directaccess server just fine on port 443, even via a web browser.
I've tried restarting the IPHelper service and the IKE service, but DA eventually reverts to the same 0x274c error. The only way to clear it is to reboot the client.
The log from the DA Troubleshooter shows that NLS thinks it's "internal" I believe, as the IsExternal and GetNLS return the internal FQDN of the DA server and try to connect to that, then throw an error 503. Almost everything after that in the log also fails, of course.
I'm at a loss as to how to solve this.