使用 EWS 创建约会时出现异常

Question

我在使用我的服务 EWS 时遇到异常，这是我的代码

public class ExchangeHelper
{
ExchangeService exchangeService;
public ExchangeHelper()
{
//Instantiate a new ExchangeService object
exchangeService = new ExchangeService(ExchangeVersion.Exchange2010_SP2);
//Set the exchange WebService URL
exchangeService.Url = new Uri("https://hostname/EWS/Exchange.asmx");
//exchangeService.Url = new Uri("https://hostname/EWS/Exchange.asmx");
//Set the credentials of the service to the credentials
//that are associated with the impersonating account.
exchangeService.Credentials = new NetworkCredential(
"user",
"pass",
"Domain.com"
);
}
public void CreateAppointment()
{
var emailAddress = "[e-mail]";
//Set the ImpersonatedUserId property of the ExchangeService object to identify the impersonated user (target account).
//This example uses the user's SMTP email address.
exchangeService.AutodiscoverUrl(emailAddress);
exchangeService.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, emailAddress);
//create a new appointment object
Appointment appointment = new Appointment(exchangeService);
//set appointment properties
appointment.Subject = "test";
appointment.Body = "testBody";
//In MSDN it says that if you dont specify the timezone, it will use the UTC timezone
//but in reality it is not working that way.
//so explicity setting the EST timezone

appointment.StartTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
appointment.Start = DateTime.Now;
appointment.EndTimeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
appointment.End = DateTime.Now.AddHours(1);
//add required participants
appointment.RequiredAttendees.Add(emailAddress);

newFolder.Save(WellKnownFolderName.Inbox);

appointment.Save(new FolderId(WellKnownFolderName.Drafts, "emailAddress"));
//Set it back to null so that any actions that will be taken using the exchange service
//applies to impersonating account (i.e.account used in network credentials)
exchangeService.ImpersonatedUserId = null;
return the unique identifier that is created
return appointment.Id.UniqueId;
}

例外情况是"帐户无权模拟请求的用户">

Answer 1

从您的帖子中不是 100% 清楚您用于 ExchangeService 上的凭据和用于模拟用户 ID 的帐户是否相同。 如果是，则无需使用模拟，也不应设置该属性。 似乎一个人应该能够冒充自己，但没有必要这样做，因此 EWS 可能会让你回避这个例外。

如果它们不同，那么就像消息中所说的那样：您用于凭据的帐户必须有权模拟您设置的用户。 这通常涉及 Exchange 管理员的一些 PowerShell 魔法来设置它。