title: Visual Studio 2015 Failing to Connect to Team Foundation Server 2017: TF31002
body: <p>We have setup a trial version of TFS 2017 in order to see if we would like to purchase a full version for our development shop.  Only one developer can connect to TFS 2017 with Visual Studio and at no point was he involved with the initial setup of TFS.</p>
  
  <p>I am running Visual Studio 2015 Enterprise and I have tried the following items with no fruition on fixing the attached image.</p>
  
  <ol>
  <li>Check that I can connect through a browser to TFS from my box.  Works.</li>
  <li>Check to see if I can telnet to the server on port 8080.  Works.</li>
  <li>White list Visual Studio and port 8080 in my firewall.  Done.</li>
  <li>Reinstall Visual Studio from scratch.  Done.</li>
  <li>Try to log into TFS from a different box using same credentials.  Done and Works.</li>
  <li>Clear cache for Visual Studio and TFS.  Done.</li>
  <li>Try running Visual Studio as Admin.  Done.</li>
  </ol>
  
  <p>I have tried all of the above (and quite a few other things) and at no point can I connect to TFS through Visual Studio.  As it stands now I don't see my shop going down the road of using TFS.</p>
  
  <p>If anyone has an idea for what to do, I'm all ears I would really like our shop to migrate to TFS based on what I have heard about it.</p>
  
  <p><a href="https://i.stack.imgur.com/UVGAk.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UVGAk.jpg" alt="Error Message from Visual Studio 2015"></a></p>