Sharepoint 通过使用Oauth（ADAL azure active directory库）401通过托管API调用EWS服务

我正在sharepoint中开发一个提供商托管的应用程序，用于调用EWS服务。我正在使用托管api

下面是我的代码

ClientCredential cc = new ClientCredential("********-****-****-****-********e042", "b/2i******n07QKJ********0uhVVvv*****BUs=");
AuthenticationContext authenticationContext = new AuthenticationContext("https://login.windows.net/mydomain.onmicrosoft.com/");
AuthenticationResult result = authenticationContext.AcquireToken("https://outlook.office365.com/", cc);
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013);
service.Credentials = new OAuthCredentials(result.AccessToken);

service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
CalendarView calView = new CalendarView(DateTime.Today, DateTime.Today.AddHours(24));

Mailbox m = new Mailbox("xxxx@xxxxxxxx.onmicrosoft.com");

FolderId CalendarFolderId = new FolderId(WellKnownFolderName.Calendar, m);

FindItemsResults<Appointment> master = service.FindAppointments(CalendarFolderId, calView);

对此的任何想法都会有所帮助

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提前感谢

欢迎来到SO。我对你的问题进行了编辑，使它更容易阅读。4个缩进将使代码看起来很好：）

[WebException: The remote server returned an error: (401) Unauthorized.]
   System.Net.HttpWebRequest.GetResponse() +6540964
   Microsoft.Exchange.WebServices.Data.EwsHttpWebRequest.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetResponse() +29
   Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request) +34

[ServiceRequestException: The request failed. The remote server returned an error: (401) Unauthorized.]
   Microsoft.Exchange.WebServices.Data.ServiceRequestBase.GetEwsHttpWebResponse(IEwsHttpWebRequest request) +149
   Microsoft.Exchange.WebServices.Data.ServiceRequestBase.ValidateAndEmitRequest(IEwsHttpWebRequest& request) +407
   Microsoft.Exchange.WebServices.Data.MultiResponseServiceRequest`1.Execute() +36
   Microsoft.Exchange.WebServices.Data.ExchangeService.FindItems(IEnumerable`1 parentFolderIds, SearchFilter searchFilter, String queryString, ViewBase view, Grouping groupBy, ServiceErrorHandling errorHandlingMode) +263
   Microsoft.Exchange.WebServices.Data.ExchangeService.FindAppointments(FolderId parentFolderId, CalendarView calendarView) +62
   SharePointApp2Web.Pages.Default.Page_Load(Object sender, EventArgs e) +1004
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +92
   System.Web.UI.Control.LoadRecursive() +54
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +772