Shoot us an email at contact opendns.com so we can 1: figure it out and get it working for you and 2: see if there is anything we need to do to fix our modify our instructions for some edge cases or different configuration.
We know a bunch of people who use AD w/ OpenDNS without any issue so I'd love to figure out how to work with you to make it work with your setup.
I'm not our AD expert though, so I'll definitely have to route this through contact opendns.com.
Happy Thanksgiving.
Thanks,
David Ulevitch (from OpenDNS)
