如何使用 EWS 托管 API 验证 Exchange 凭据并验证 Exchange 服务器通信？

Question

使用 Exchange EWS 托管 API 2.0，这是我用来验证凭据的方法：

public static bool TestExchangeConnetion(UserSettingDTO credential, ServerSettingDTO serverSetting)
    {
        bool authenticated = false;
        Microsoft.Exchange.WebServices.Data.ExchangeService service;


        service = new ExchangeService((ExchangeVersion)Enum.Parse(typeof(ExchangeVersion), serverSetting.ExchangeVer));
        service.Url = new Uri(serverSetting.ExchangeURL);


        service.Credentials = new NetworkCredential(credential.ExchangeUsername, credential.ExchangePassword);

        try
        {
            //make a call to ensure that credentials are working
            AlternateIdBase response = service.ConvertId(new AlternateId(IdFormat.EwsId, "Placeholder", credential.ExchangeUsername), IdFormat.EwsId);
        }
        // The credentials were authenticated. We expect this exception since we are providing intentional bad data for ConvertId
        catch (ServiceResponseException)
        {
            authenticated = true;
        }

        // The credentials were not authenticated.
        catch (ServiceRequestException)
        {
            authenticated = false;
        }
        catch (Exception)
        {
            authenticated = false;
        }

        return authenticated;
    }

这绝对可以很好地验证凭据，但我正在寻找一种方法来区分无效凭据和 Exchange 服务器停机时间。此代码对两者都返回 false。 是否可以查明与服务器通信是否存在问题（如服务器停机时间）？这样做的原因是我想通知用户无效凭据而不是服务器停机时间！

Answer 1

EWS 只是一个在 IIS 上运行的 Web 服务（因此 IIS 负责身份验证）如果您只想检查凭据为什么不针对 services.wsdl 文件发出 Get 请求或 Get on CAS 服务器上的自动发现端点。如果凭据不正确，则此时应返回 401。

干杯 格伦