SharePoint Add/Send Appointment Using Exchange Web Services (EWS)

Add Web Service  : https://domain/ews/services.wsdl

try

            {

                SPSecurity.RunWithElevatedPrivileges(delegate()

                {

                    EWS.ExchangeServiceBinding esb = new ExchangeServiceBinding();

                    esb.RequestServerVersionValue = new RequestServerVersion();

                    esb.RequestServerVersionValue.Version = ExchangeVersionType.Exchange2010_SP1;

                    //URL = https://domain/EWS/exchange.asmx

                    esb.Url = CommonConstants.Instance.CONST_EWS_EXCHANGE_WEBSERVICE_URL;

                    

                    esb.Credentials = new System.Net.NetworkCredential(CommonConstants.Instance.CONST_EWS_USERNAME,

                        CommonConstants.Instance.CONST_EWS_PASSWORD,

                        CommonConstants.Instance.CONST_EWS_DOMAIN);

                    esb.PreAuthenticate = true;

                    System.Net.ServicePointManager.ServerCertificateValidationCallback = ((sender, certificate, chain, errors) => true);

                    #region Create the appointment.

                    CalendarItemType appointment = new CalendarItemType();

                    // Add item properties to the appointment.

                    appointment.Body = new BodyType();

                    appointment.Body.BodyType1 = BodyTypeType.HTML;

                    appointment.Body.Value = _body;

                    //appointment.Categories = new string[] { "Category1", "Category2" };

                    appointment.Importance = ImportanceChoicesType.High;

                    appointment.ImportanceSpecified = true;

                    appointment.ItemClass = "IPM.Appointment";

                    appointment.Subject = _subject;

                    appointment.LegacyFreeBusyStatus = EWS.LegacyFreeBusyType.Busy;

                    appointment.LegacyFreeBusyStatusSpecified = true;

                    appointment.ReminderIsSet = true;

                    appointment.ReminderIsSetSpecified = true;

                    appointment.ReminderMinutesBeforeStart = CommonConstants.Instance.CONST_EWS_APPOINTMENT_REMINDER;

                    appointment.Location = _location;

                    // Add calendar properties to the appointment.

                    appointment.Start = new DateTime(_startdate.Year, _startdate.Month, _startdate.Day, _startdate.Hour + 1, _startdate.Minute, _startdate.Second, DateTimeKind.Local);

                    appointment.StartSpecified = true;

                    appointment.End = new DateTime(_enddate.Year, _enddate.Month, _enddate.Day, _enddate.Hour + 1, _enddate.Minute, _enddate.Second, DateTimeKind.Local);

                    appointment.EndSpecified = true;

                    // Setup the RequiredAttendees array

                    appointment.RequiredAttendees = new AttendeeType[_attendees.Count];

                    int int_attendee = 0;

                    foreach (string email in _attendees)

                    {

                        appointment.RequiredAttendees[int_attendee] = new AttendeeType();

                        appointment.RequiredAttendees[int_attendee].Mailbox = new EmailAddressType();

                        appointment.RequiredAttendees[int_attendee].Mailbox.EmailAddress = email;

                        appointment.RequiredAttendees[int_attendee].Mailbox.RoutingType = "SMTP";

                        int_attendee++;

                    }

                    #endregion

                    // Identify the destination folder that will contain the appointment.

                    DistinguishedFolderIdType folder = new DistinguishedFolderIdType();

                    folder.Id = DistinguishedFolderIdNameType.calendar;

                    // Create the array of items that will contain the appointment.

                    NonEmptyArrayOfAllItemsType arrayOfItems = new NonEmptyArrayOfAllItemsType();

                    arrayOfItems.Items = new ItemType[1];

                    // Add the appointment to the array of items.

                    arrayOfItems.Items[0] = appointment;

                    #region Create the CreateItem request.

                    CreateItemType createItemRequest = new CreateItemType();

                    // The SendMeetingInvitations attribute is required for calendar items.

                    createItemRequest.SendMeetingInvitations = CalendarItemCreateOrDeleteOperationType.SendToAllAndSaveCopy;

                    createItemRequest.SendMeetingInvitationsSpecified = true;

                    // Add the destination folder to the CreateItem request.

                    createItemRequest.SavedItemFolderId = new TargetFolderIdType();

                    createItemRequest.SavedItemFolderId.Item = folder;

                    // Add the items to the CreateItem request.

                    createItemRequest.Items = arrayOfItems;

                    #endregion

                    try

                    {

                        // Send the request and get the response.

                        CreateItemResponseType createItemResponse = esb.CreateItem(createItemRequest);

                        // Get the response messages.

                        ResponseMessageType[] rmta = createItemResponse.ResponseMessages.Items;

                        //foreach (ResponseMessageType rmt in rmta)

                        //{

                        //    //rmt.ResponseCode = ResponseCodeType.NoError

                        //    ArrayOfRealItemsType itemArray = ((ItemInfoResponseMessageType)rmt).Items;

                        //    ItemType[] items = itemArray.Items;

                        //    // Get the item identifier and change key for each item.

                        //    foreach (ItemType item in items)

                        //    {

                        //    }

                        //}

                    }

                    catch (Exception ex)

                    {

                        CommonHelper.ExceptionHandler(ex);

                    }

                });

            }

            catch (Exception ex)

            {

                CommonHelper.ExceptionHandler(ex);

            }