Sorry for starting another thread, you can delete it.... now that I've found this one. :)
I ran your test files, and it worked exactly as you said it should except when I modified the security on the default.aspx file it still prompted me to enter my credentials rather than auto-logging me in. I'm not sure what that tells me, but what does it tell you?
The display did show the correct domain and user information, after I entered it at the IE-generated login popup.
My issue is that DNN won't seem to auto-login using the AD authentication. I have everything set up as it should be, according to many other posts (you could post the contents of my other thread into here, Mike, if that would help), including having the file security set as it should be (anonymous off, integrated windows authentication) on the appropriate file.
I'd love some assistance, as this is the last thing I need to sort out before I do some final testing before putting the site up for the staff.
Thanks,
Marc