title: Getting the Logon_User in IIS 7.5
body: <p>I have a .NET 4 application that I am taking to IIS 7.5.  In it, I have the following code:
  HttpContext.Current.Request.ServerVariables["LOGON_USER"]
  This code is in my global.asax file and is in my Application_BeginRequest method.</p>
  
  <p>For my application, this is returning an empty string.  That makes me think that I don't have my authentication setup.  I go into the IIS admin manager, and I have Anonymous, Digest, and Forms Authentication disabled.  I have ASP.NET Impersonation, Basic, and Windows Authentication enabled.  </p>
  
  <p>Any ideas regarding what I need to do to get the actual windows auth userid would be appreciated.</p>
  
  <p>Wally</p>