Server 2012 Remote Access/RDweb can't get past second authentication prompt. Where does authentication take place?

I can't get past 2nd Authentication on my Remote access server.  

Remote Access 2nd Authentication won't authenticate.  I am  using web access to allow a user to launch remote desktop to attach to their computer at work.  I have hosting all RD services on a single Hyper-V server running Server 2012.  I can login to RDWeb site a see my applications (Remote Desktop, Calc). I click on either app I get the remote app warning shown in Picture 1..  When I click connected I am prompted to Authenticate again with the screen in picture 2 .  I can't get past this screen even with proper password.  I have tried various user/admin account still no go.  Why can't it authenticate?  The really sad part is I had it working yesterday with 1 authentication and have done this to myself.  I am not sure what I changed to cause this.  Thanks.