title: IIS7 - Windows Authentication failure - duplicate requests
body: <p>I have configured IIS7 with Windows Authentication enabled, but I get authentication failures for a remote domain user.</p>
  
  <p>Looking into the logs I see two consecutive requests, with the first one being with the user not set, hence the 401s.</p>
  
  <pre><code>2012-04-02 20:57:23 XXX-IP-XXX GET /favicon.ico - 80 - XXX-IP-XXX Mozilla/5.0+(Windows+NT+6.1;+WOW64)+AppleWebKit/535.19+(KHTML,+like+Gecko)+Chrome/18.0.1025.142+Safari/535.19 401 2 5 4
  
  2012-04-02 20:57:23 XXX-IP-XXX GET /favicon.ico - 80 DOMAIN\user XXX-IP-XXX Mozilla/5.0+(Windows+NT+6.1;+WOW64)+AppleWebKit/535.19+(KHTML,+like+Gecko)+Chrome/18.0.1025.142+Safari/535.19 404 0 2 227
  </code></pre>
  
  <p>Any ideas?</p>