title: Are visualStudioOnline ServiceHooks available for on-premise TFS instances?
body: <p>I would like to subscribe events from our on-premise TFS instance.</p>
  
  <p>But when querying for the available publishers, I get a "ServiceHooksFeatureFlagNotEnabled" exception..</p>
  
  <pre><code>// http://tfs/DefaultCollection/_apis/hooks/publishers?api-version=1.0
  
  {
  
    "$id": "1",
    "innerException": null,
    "message": "Error in the application.",
    "typeName": "Microsoft.VisualStudio.Services.ServiceHooks.Publishers.Server.ServiceHooksPublisherControllerBase+ServiceHooksFeatureFlagNotEnabledException, Microsoft.VisualStudio.Services.ServiceHooks.Publishers.Server, Version=12.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a",
    "typeKey": "ServiceHooksFeatureFlagNotEnabledException",
    "errorCode": 0,
    "eventId": 4501
  }
  </code></pre>
  
  <p>Is this an imposed limitation for on-premise instances? Or this is an optional feature, that must be expressely enabled?</p>
  
  <p>Our server ships a TFS2013.4.</p>