401未经授权而订阅与Exchange服务和OAuth

我试图访问EWS托管API推送通知（订阅推送通知），通过OAuth如下：401未经授权而订阅与Exchange服务和OAuth

var authenticationTask = await authenticationContext.AcquireTokenAsync("https://outlook.office365.com", new ClientCredential(clientID, clientSecret)); 
string targetSmtp = "[email protected]"; 
ExchangeService exchangeService = new ExchangeService(ExchangeVersion.Exchange2013); 
exchangeService.Url = someURL; 
exchangeService.TraceEnabled = true; 
exchangeService.TraceFlags = TraceFlags.All; 
exchangeService.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.PrincipalName, "[email protected]"); 
exchangeService.HttpHeaders.Add("X-AnchorMailbox", targetSmtp); 
exchangeService.Credentials = new OAuthCredentials(authenticationTask.AccessToken); 
PushSubscription subscription = exchangeService.SubscribeToPushNotifications(
              new[] { someFolder }, 
              new Uri(postBackUrl), 
              15, 
              null, 
              EventType.NewMail, 
              EventType.Created, 
              EventType.Deleted, 
              EventType.Modified, 
              EventType.Moved, 
              EventType.Copied);

我能够得到令牌我应用程序，但同时认购推送通知用户（[email protected]）我得到"The request failed. The remote server returned an error: (401) Unauthorized."错误

更新：尝试以下这里所说的完全一样的步骤：Azure AD app-only access tokens for exchange impersonation但仍然得到401

来源

2017-08-10 tavier

对于那些在同一个问题上挣扎的人，我们需要通过使用证书（而不是使用客户机密钥）来获取已注册应用程序的访问令牌。有关如何操作的更多详细信息，请参阅：https://blogs.msdn.microsoft.com/exchangedev/2015/01/21/building-daemon-or-service-apps-with-office-365-mail-calendar-and-contacts-apis-oauth2-client-credential-flow/

来源

2017-08-16 11:17:47 tavier

401未经授权而订阅与Exchange服务和OAuth

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