title: 401 Unauthorized Error On SSRS URL Access ... but it works in Fiddler?
body: <p>I am attempting to generate a pdf from a SSRS report using URL Access in C#.
  (In the business layer behind a WebApi Controller) I create an instance of the HttpClient, assign correct credentials and form the request URL like:</p>
  
  <blockquote>
    <p><a href="http://sqlserver1/ReportServer/Pages/ReportViewer.aspx?/Clients/Acme/AcmeActivitySummary&amp;rs:Command=Render&amp;rs:format=pdf&amp;Region=west&amp;CutOffDate=10/25/2015" rel="noreferrer">http://sqlserver1/ReportServer/Pages/ReportViewer.aspx?/Clients/Acme/AcmeActivitySummary&amp;rs:Command=Render&amp;rs:format=pdf&amp;Region=west&amp;CutOffDate=10/25/2015</a></p>
  </blockquote>
  
  <p>If I put my URL in a browser, it downloads the expected PDF file.
  When I execute this URL from the HttpClient instance to return a stream, I get a 401 Unauthorized Error. </p>
  
  <p>If I open up Fiddler to see why...it works as expected.</p>
  
  <p>How do I make this work without having to use Fiddler...and why doesn't it work now?</p>