I have just setup a Win2008R2 DirectAccess server (and also a Win2008R2 Active Directory server).
From the Internet I can Remote Desktop login to the AD server, but I cannot RDP into the DirectAccess server. I can PING both servers and get an IPv6 response.
(I can RDP to the DirectAccess server from the internal company network)
DirectAccess is configured to allow full intranet access.
I think I've hit a mental block, the answer will probably be obvious, but I just can't see it.