title: SSRS 2012 Report Builder fails to run from remote host - 401 Unauthorized
body: <p>I have SSRS 2012 native mode. I can run Report Builder from localhost where SSRS is installed.
  I am unable to run Report Builder from other machines, and I am getting such error:</p>
  
  <blockquote>
    <p>Downloading http//10.149.100.*/ReportServer/ReportBuilder/ReportBuilder_3_0_0_0.application did not succeed.</p>
    
    <p>The remote server returned an error: (401) Unauthorized.</p>
  </blockquote>
  
  <p>Here is my scenario:
  SSRS is installed on a server which is in a workgroup. There is local user on that server, ie. ruser.
  I am accessing report manager from other computer which is in other workgroup/domain using address http//ssrs_server/Reports and I am passing ruser login and password. I can run every report in such way.
  But I can't run Report Builder using button in the report manager.</p>
  
  <p>I already tried this instruction <a href="http://msdn.microsoft.com/en-us/library/8faf2938-b71b-4e61-a172-46da2209ff55%28v=sql.110%29" rel="nofollow">http://msdn.microsoft.com/en-us/library/8faf2938-b71b-4e61-a172-46da2209ff55%28v=sql.110%29</a>
  and I set Basic Authentication with anonymous access to report builder.
  Specifically I performed all steps from 1 to 6 in the section  Enabling Anonymous Access to Report Builder Application Files.
  The only result was that after I clicked on Report Builder button I received HTTP 500 error instead of HTTP 401.</p>
  
  <p>Then I found out that I can place Report Builder installation files on the IIS and set custom url to the Report Builder. I did it and I could finally run report builder from other machine.</p>
  
  <p>The only problem is that when the Report Builder is run from custom IIS URL then it doesn't connect to report server automatically.
  However it is connecting automatically when it is run from default SSRS link.</p>
  
  <p>What I want to achieve is:</p>
  
  <ul>
  <li>either make the Report Builder to be runnable from default SSRS link</li>
  <li>either make the Report Builder to be runnable from a custom IIS link (already did it) but also make it automatically connecting to report server.</li>
  </ul>