title: Can't close Incident through Web API client side
body: <p>On Dynamics 365, we are trying to close incidents using the client side Web API.</p>
  
  <p>After looking at the doc (in C#), we understand that we first need to create a IncidentResolution activity, which we did successfully.
  However, we don't understand how to fully close the Incident entity then.</p>
  
  <p>I assume we need to update the record's stateCode and statusCode.. However, if I do so, ajax always return a 500 error.</p>
  
  <p><strong>Other updates are working fine.</strong></p>
  
  <p>Is there anything that we're missing here ?</p>
  
  <pre><code>var entity = {};
  entity.statecode = 1; // Resolved
  entity.statuscode = 5; // Problem Solved
  entity.title = "Title of my case";
  
  var req = new XMLHttpRequest();
  req.open("PATCH", Xrm.Page.context.getClientUrl() + "/api/data/v8.2/incidents(Case's guid)", true);
  req.setRequestHeader("OData-MaxVersion", "4.0");
  req.setRequestHeader("OData-Version", "4.0");
  req.setRequestHeader("Accept", "application/json");
  req.setRequestHeader("Content-Type", "application/json; charset=utf-8");
  req.onreadystatechange = function() {
      if (this.readyState === 4) {
          req.onreadystatechange = null;
          if (this.status === 204) {
              //Success - No Return Data - Do Something
          } else {
              Xrm.Utility.alertDialog(this.statusText);
          }
      }
  };
  req.send(JSON.stringify(entity)); 
  </code></pre>