I've read conflicting articles about remote administration of external DA clients. One Technet blog here http://blogs.technet.com/b/edgeaccessblog/archive/2010/09/14/how-to-enable-remote-desktop-sharing-rds-rdp-from-corporate-machines-to-directaccess-connected-machines.aspx says:
"Because we use IPv6 in Direct Access, any corporate client that wants to communicate to the DirectAccess clients must have an IPv6 address. We can set up either a real IPv6 addressing scheme or set up ISATAP, which does not require IPv6 aware routers, switches or hubs".
But then when I read anything about configuring DA anywhere else on Technet it says using ISATAP on the corporate network is not supported.
Confused???