在 EWS 中访问会议室日历会返回"No mailbox with such guid"

Question

我正在尝试使用Microsoft Exchange（EWS）API从房间共享日历中获取会议列表，并且它返回此错误：没有此类GUID 的邮箱

var service = new ExchangeService();
service.Credentials = new NetworkCredential("username", "password");
service.Url = new Uri("exchangeUrl");
var startDate = DateTime.Today;
var endDate = DateTime.Today.AddDays(1);
var cv = new CalendarView(startDate, endDate);
var mailboxToAccess = "[e-mail]";
var calendarFolderId = new FolderId(WellKnownFolderName.Calendar, mailboxToAccess);
var appointments = service.FindAppointments(calendarFolderId, cv); // << Exception happens here

有什么想法可能是什么问题？

Answer 1

确保您在

中使用的用户

service.Credentials = new NetworkCredential("username", "password");

是一个有执照的用户，拥有自己的邮箱，已被授予访问有关的共享邮箱。

Answer 2

如果您尝试从应用程序端访问Outlook邮箱。
语言：c＃

service.Credentials = new NetworkCredential("username", "password");   
service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");