title: Visual Studio Team Service: TF31002 Unable to connect to this Team Foundation Server
body: <p>I have VS2013 Ultimate Update 5 and VS2015 Enterprise Update 1 installed on the same machine, Windows Server 2012 R2. Using VS2013 I'm able to connect to VSTS without anyn issues, however with VS2015 I'm getting the below connection failure:
  <a href="https://i.stack.imgur.com/pk12m.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/pk12m.png" alt="enter image description here"></a></p>
  
  <p>Any help on how I can resolve this issues is much appreciated.</p>