<script type="javascript" runat="server">

Platform.Load("Core","1.1.5");
var TestDE = DataExtension.Init("PushAddressQueryLogs");

var midJson = [
  {
    "BusinessUnitId": 7z8x49y,
    "QueryObjectId": "c91f0XXX-501e-YYYY-9469-ZZZZdff510e7"
  },
  {
    "BusinessUnitId": z09v67t8,
    "QueryObjectId": "c0ba1QQQQ-f3e6-4YYYY-8e2f-9bEEE3b06255"
  }
];

for (var i=0; i < midJson.length; i++) {

var mid = midJson[i].BusinessUnitId;
var objectid = midJson[i].QueryObjectId;
var taskid = '';
try {

     var api = new Script.Util.WSProxy();

     api.setClientId({ "ID": mid }); //Impersonates the BU
     var action = "Start";
     var props = {
             ObjectID: objectid
     };
     var opts = {};

     var data = api.performItem("QueryDefinition", props, action, opts);
     TestDE.Rows.Add({"log":i+ " : task id : "+data.Results[0]).Task.ID});
     taskid = data.Results[0]).Task.ID
} catch(e) {
     Platform.Response.Write('error: ' + Platform.Function.Stringify(e));
}

do {

     var prox = new Script.Util.WSProxy();

     prox.setClientId({ "ID": mid }); //Impersonates the BU

     var cols = ["Status"];
     var filter = {
         Property: "TaskID",
         SimpleOperator: "equals",
         Value: taskid
     };

     var desc = prox.retrieve("AsyncActivityStatus", cols, filter);

     var queryStatus = desc.Results[0].Status;
     var result = TestDE.Rows.Add({"log":i+ " : query status : "+ desc.Results[0].Status});


  } while(queryStatus != 'Complete')

}
</script>