jsreport.renderAsync(printCommand).then(function (res) {
            var placeholder2 = document.getElementById("reportPlaceholder");                
            var iframe = "<iframe type='application/vnd.openxmlformats-officedocument.wordprocessingml.document' frameborder='0' src='" + res.toObjectURL() + "' style='width:100%;height:100%;'></iframe>";
            placeholder2.innerHTML = iframe;
            if (successCallback) {
                successCallback(res);
            }
        }, function (error) {
            if (failCallback) failCallback(error);
        });

You probably want to render the request like this

{ 
  "template": {...},
  "data": {...},
  "options": { 
    "office": {
       "preview": true
    }
  }

Then the output is html with iframe already locating the office online.