Exchange Online 和 EWS with Basic Auth 停止工作

Question

我想使用具有基本身份验证的 EWS 托管 API 连接到 Exchange Online。

但在我的应用程序中，EWS AutodiscoverService 在使用基本身份验证时无法从 Exchange Online 检索邮箱设置 (GetUserSettings)，但 oAuth 工作正常。

我收到 Microsoft.Exchange.WebServices.Data.ServiceRequestException 消息“连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立的连接失败，因为连接的主机未能响应 40.101.50.162:444"

我已经使用基本身份验证好几年了，几天前它刚刚停止工作。是否不再可以对 Exchange Online 和 EWS 使用基本身份验证？

代码示例

var ads = new AutodiscoverService
             {
                 RedirectionUrlValidationCallback = url => true,
                 EnableScpLookup = false
             };
ads.Credentials = new NetworkCredential( svcUsr, svcPwd ); // using these will throw an exception
ads.Credentials = new OAuthCredentials( token.AccessToken ); // these works
var res = ads.GetUserSettings( mailBox, UserSettingName.GroupingInformation );

异常

Microsoft.Exchange.WebServices.Data.ServiceRequestException: The request failed. Unable to connect to the remote server ---> System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 40.101.28.194:444
       at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress)
       at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Exception& exception)
       --- End of inner exception stack trace ---
       at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)
       at System.Net.HttpWebRequest.GetRequestStream()
       at Microsoft.Exchange.WebServices.Data.EwsHttpWebRequest.Microsoft.Exchange.WebServices.Data.IEwsHttpWebRequest.GetRequestStream()
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverRequest.InternalExecute()
       --- End of inner exception stack trace ---
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverRequest.InternalExecute()
       at Microsoft.Exchange.WebServices.Autodiscover.GetUserSettingsRequest.Execute()
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverService.InternalGetUserSettings(List`1 smtpAddresses, List`1 settings, Nullable`1 requestedVersion, Uri& autodiscoverUrl)
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverService.GetSettings[TGetSettingsResponseCollection,TSettingName](List`1 identities, List`1 settings, Nullable`1 requestedVersion, GetSettingsMethod`2 getSettingsMethod, Func`1 getDomainMethod)
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverService.GetUserSettings(List`1 smtpAddresses, List`1 settings)
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverService.InternalGetSoapUserSettings(String smtpAddress, List`1 requestedSettings)
       at Microsoft.Exchange.WebServices.Autodiscover.AutodiscoverService.GetUserSettings(String userSmtpAddress, UserSettingName[] userSettingNames)
       at EWSAutoDiscovery.Program.Main(String[] args) in C:\Program.cs:line 57

已测试和验证的内容 [更新 1]

我已经验证了一些 EWS 操作仍然可以使用基本身份验证，例如SyncFolderItems.
我已验证服务帐户用户和 EXO 常规配置都有身份验证策略。
我创建了一个在所有协议上启用 BasicAuth 的身份验证策略，并将其分配给 EXO 组织配置 DefaultAuthenticationPolicy 参数。
我已将身份验证策略分配给服务帐户和目标用户。
我已删除并重新应用服务帐户上的 ApplicationImpersonation 角色。

Answer 1

对于使用我的应用程序的所有 O365/Azure 租户，具有基本身份验证的自动发现在夜间再次开始工作。

Microsoft 一定已经修复了他们几天前坏掉的东西。

Exchange Online 和 EWS with Basic Auth 停止工作

Exchange Online and EWS with Basic Auth stopped working

c#

office365

exchangewebservices