I get a login prompt - it still requires the "DOMAIN\username" - but I have a quirk.  If I try to use "username" first, the login prompt reloads and autofills the login blank with "tempdomain.net\username" using the actual tempdomain.net for the site rather than the overall DOMAIN\. 

So not only will my users try just their username first and get the prompt again - but they'll have to back out the "tempdomain.net\" and replace it with "DOMAIN\". 

Can anyone help?

I installed the site 2 weeks ago fresh (4.9.2).  I have loaded the 1.00.06 AD Auth Provider.  After loading the Auth provider I set all the info and got the results I'm seeing.  I jumped around through several of the instructional posts guys have put on here to try to make it work better.  Most of them read the same, indicating that I'm setup correctly.  I eventually went back to reinstall the AD Provider just to make sure I'd done it right.  Then I went into the ADMIN/SECURITY and PROVIDER folders and didn't find the files that should have been there "windowssignin.ascx..." etc.  I manually copied them into there.  Still get the same results though.  I get prompt ... back out tempdomain.net\ and add in domain\ and get on.  From then on I am auto logged on unless I log out and get in as host.  Then I have to reenter the login info again the next visit.

I haven't dropped any script code in the login file.  I did try to uncomment the one auth line in the web.config mentioned in one post, but the site doesn't even come up when I do that so I have left it commented out for now  (I can attempt editing the login.ascx if you have a sample code to alter the tempdomain.net\).  Thanks!