public static void Run()
{
//ExStart: RetreiveExtAttributesForCalendarItems
IEWSClient client = EWSClient.GetEWSClient("https://exchange.office365.com/Exchange.asmx", "username", "password");
//Fetch all calendars from Exchange calendar's folder
string[] uriList = client.ListItems(client.MailboxInfo.CalendarUri);
//Define the Extended Attribute Property Descriptor for searching purpose
//In this case, we have a K1 Long named property for Calendar item
PropertyDescriptor propertyDescriptor = new PidNamePropertyDescriptor("K1", PropertyDataType.Integer32, new Guid("00020329-0000-0000-C000-000000000046"));
//Fetch calendars that have the custom property
IList <MapiCalendar> mapiCalendarList = client.FetchMapiCalendar(uriList, new PropertyDescriptor[] { propertyDescriptor });
foreach (MapiCalendar cal in mapiCalendarList)
{
foreach (MapiNamedProperty namedProperty in cal.NamedProperties.Values)
{
Console.WriteLine(namedProperty.NameId + " = " + namedProperty.GetInt32());
}
}
//ExEnd: RetreiveExtAttributesForCalendarItems
}