4aiman

import { ExchangeService, ExchangeVersion, WebCredentials, Uri, DateTime, CalendarView, WellKnownFolderName, EwsLogging } from "ews-javascript-api";
import credentials = require("./credentials"); //for username and password

EwsLogging.DebugLogEnabled = false;

var service = new ExchangeService(ExchangeVersion.Exchange2010);
service.Credentials = new WebCredentials(credentials.userName, credentials.password);
service.Url = new Uri("https://outlook.office365.com/Ews/Exchange.asmx");

var view = new CalendarView(DateTime.Now.Add(-1, "week"), DateTime.Now); // appointments in last one week.

4aiman