title: Visual Studio 2017 Enterprise Offline Installation Fails
body: <p>I have created a Visual Studio 2017 offline installer using the command: <code>mu_visual_studio_enterprise_2017_x86_x64_10049783.exe --layout c:\vs2017offline</code></p>
  
  <p>Behind firewall, when I execute mu_visual_studio_enterprise_2017_x86_x64_10049783.exe, in the vs2017offline folder, I'm getting the following error:</p>
  
  <p>Details
      WebClient download failed: The remote server returned an error: (407) Proxy Authentication Required.
      Bits download failed: Error context: BG_ERROR_CONTEXT_REMOTE_FILE, Error code: -2145844841
      WinInet download failed: Url '<a href="https://download.microsoft.com/download/0/1/2/012ECA6A-588A-4E9A-9759-62DB964C511A/VSInitializer.exe" rel="noreferrer">https://download.microsoft.com/download/0/1/2/012ECA6A-588A-4E9A-9759-62DB964C511A/VSInitializer.exe</a>' returned HTTP status code: 407</p>
  
  <p>Seems  the installer still attempts making a connection to the internet.</p>
  
  <p>Help.</p>