Pass-through still prompts for username/password

Pass-through still prompts for username/password

I am testing out ServiceDesk Plus and have it installed on a domain controller running Server 2008 R2.  I was able to set up AD pass-through with no issues, the computer account was properly created.  Yet when I try to log in I am still prompted for a username and password.  I have tried on multiple OS's and internet browsers, but I get the same results.  Has anyone else experienced this issue?  Is there a solution?

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