title: How can i get the value from Request.ServerVariables("LOGON_USER") when the application is running in IIS?
body: <p>I'm not using any built in authentication mechanism, just building a simple intranet site that requires logon.</p>
  
  <p>BUT i was asked to retrieve the current windows logon name of the user, and authenticate him with this information.</p>
  
  <p>When reading the Request.ServerVariables("LOGON_USER") information from my box, everything runs fine. But this value is always blank when the application is running with IIS on my server. </p>
  
  <p>Any ideas?</p>