无法使用EWS访问Exchange设备邮箱

Question

我已经设置了一个Office365设备邮箱，这样我就可以在outlook中打开它（使用Open->其他用户的邮箱），但是我无法使用C#EWS API访问该邮箱。访问邮箱的代码：

_service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, delegateBox);
 _inbox = Folder.Bind(_service, WellKnownFolderName.Inbox);

结果出现以下异常：

Exception in ProcessWebException
Microsoft.Exchange.WebServices.Data.ServiceResponseException: The SMTP address has no mailbox associated with it.
at Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ProcessWebException(WebException webException)
at   Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(HttpWebRequest request)
at Microsoft.Exchange.WebServices.Data.SimpleServiceRequestBase.InternalExecute()
at Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute()
at Microsoft.Exchange.WebServices.Data.ExchangeService.BindToFolder(FolderId folderId, PropertySet propertySet)
at Microsoft.Exchange.WebServices.Data.ExchangeService.BindToFolder[TFolder](FolderId folderId, PropertySet propertySet)
at Microsoft.Exchange.WebServices.Data.Folder.Bind(ExchangeService service, WellKnownFolderName name)

Answer 1

检查delegateBox是否实际对应于该用户的电子邮件。注意，用户的电子邮件可以非常不同于其“登录名+域”。

测试委派/模拟访问时，我建议将委派/模拟帐户设置为Outlook中的附加邮箱。它将允许验证是否有对委托/模拟邮箱的实际访问，并查看实际的电子邮件地址。