我发现很奇怪我能够在我公司的Exchange 2010服务器上使用在我的XP机器上运行的asp.net 4.0 Web应用程序在我的日历中创建约会，这甚至不是域的一部分！但是当我上传它时代码到我们公司的 生产环境 Web应用程序服务器（与Exchange服务器不同），然后我得到如下错误：

System.Net.WebException：远程服务器返回错误：（401）未经授权

我一直在使用Window的身份验证 . 使用 service.UseDefaultCredentials = true ;我无法为将要使用此应用程序的每位员工使用用户名/ paasword . 我认为 生产环境 Web应用程序服务器（Windows 2008 m / c）存在一些问题（权限/权限/禁用模拟）问题 . 我甚至通过选择它可能运行的所有内置帐户，但在IIS 7中使用应用程序池标识，但同样的错误 . 在调用 Appointment.Save() 之前，我可以清楚地看到它在我的Windows帐户下运行 . 我简要冒充使用登录用户's credentials and then removing the impersonation. I saw this technique elsewhere. But that doesn' t也有任何不同 .

这些是代码文件：

Default.aspx.cs

//（在标记页面Default.aspx中没有进行任何操作 . 因此不包括）

using System;
            using System.Collections.Generic;
            using System.Web;
            using System.Web.UI;
            using System.Web.UI.WebControls;


            using  Microsoft.Exchange.WebServices.Data;
            using Microsoft.Exchange.WebServices.Autodiscover;
            using System.Web.Configuration;

            namespace TestExchangeWebServices
            {
                public partial class _Default : System.Web.UI.Page
                {
                    protected ExchangeService service;

                    protected void Page_Load(object sender, EventArgs e)
                    {
                        service = new ExchangeService(ExchangeVersion.Exchange2010);
                        service.UseDefaultCredentials = true;
                        service.Url = new Uri(WebConfigurationManager.AppSettings["EWSURL"]);


                        SetAppointment("Test", DateTime.Now, "Test");

                    }

                    public void SetAppointment(string Subject, DateTime AptDateTime, string Body)
                    {
                        Appointment apt = new Appointment(service);
                        apt.Subject = Subject;
                        apt.Body = Body;
                        apt.Body.BodyType = BodyType.HTML;
                        apt.Start = AptDateTime;
                        apt.End = apt.Start.AddMinutes(30.00);
                        apt.ReminderMinutesBeforeStart = 15;
                        apt.IsReminderSet = true;

                        HttpContext.Current.Trace.Write("Before Impersonation: System.Security.Principal.WindowsIdentity.GetCurrent().Name = " + System.Security.Principal.WindowsIdentity.GetCurrent().Name  );

                        System.Security.Principal.WindowsImpersonationContext impersonationContext;
                        impersonationContext = ((System.Security.Principal.WindowsIdentity)HttpContext.Current.User.Identity).Impersonate();// //System.Threading.Thread.CurrentPrincipal.Identity

                        HttpContext.Current.Trace.Write("Before Saving Appointment. System.Security.Principal.WindowsIdentity.GetCurrent().Name = " + System.Security.Principal.WindowsIdentity.GetCurrent().Name);
//This is where the call is made and error occurs                            
apt.Save(SendInvitationsMode.SendToNone);
                        HttpContext.Current.Trace.Write("After Saving Appointment.");

                        impersonationContext.Undo();
                    }

                }
            }

Web.Config

<?xml version="1.0"?>


  <configuration>
    <appSettings configProtectionProvider="RsaProtectedConfigurationProvider">
      <EncryptedData Type="http://www.w3.org/2001/04/xmlenc#Element"
        xmlns="http://www.w3.org/2001/04/xmlenc#">
        <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#tripledes-cbc" />
        <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
          <EncryptedKey xmlns="http://www.w3.org/2001/04/xmlenc#">
            <EncryptionMethod Algorithm="http://www.w3.org/2001/04/xmlenc#rsa-1_5" />
            <KeyInfo xmlns="http://www.w3.org/2000/09/xmldsig#">
              <KeyName>Rsa Key</KeyName>
            </KeyInfo>
            <CipherData>
              <CipherValue>0Sw7QiYFKoD65nCXfakXUhJrjapk4uyQ9u6aPBStxB1XBIIPtXbuZJZb/GyMxgl7Gi3sqIkoq66BKa+MSzjAkpkIfnZmOhMNVomKofC3rlEf9NeIAdCEvjcmENhfGyA6aEJj96mGDxRDBE/FP1iQ8Z3x8Rob+HG1sbD0YJy2rpA=</CipherValue>
            </CipherData>
          </EncryptedKey>
        </KeyInfo>
        <CipherData>
          <CipherValue>HmmlAzyuedvlQ/+grwRKjTs5Z7sg5dYShHFYsFcI0q2ugkZ7oYYNTTEycyqzKyXmaaqwyE2lAsApApSvT+JDys021+sMrqLrF37xAkjRimKbPTylgznRZLQx2qKAZstb6qIis2mcLykgURtp2ytfoPl83jJzEU1y6PtB0loB/p4=</CipherValue>
        </CipherData>
      </EncryptedData>
    </appSettings>
    <connectionStrings>
      <add name="ApplicationServices"
           connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnetdb.mdf;User Instance=true"
           providerName="System.Data.SqlClient" />
    </connectionStrings>

    <system.web>
      <identity impersonate="false"/>

      <customErrors mode="Off"></customErrors>

      <compilation debug="true" targetFramework="4.0" />

      <authentication mode="Windows">

      </authentication>

      <membership>
        <providers>
          <clear/>
          <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices"
               enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false"
               maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10"
               applicationName="/" />
        </providers>
      </membership>

      <profile>
        <providers>
          <clear/>
          <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/"/>
        </providers>
      </profile>

      <roleManager enabled="false">
        <providers>
          <clear/>
          <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />
          <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />
        </providers>
      </roleManager>

    </system.web>

    <system.webServer>
       <modules runAllManagedModulesForAllRequests="true"/>

       <httpErrors errorMode="Detailed" />
       <asp scriptErrorSentToBrowser="true"/>

    </system.webServer>
  </configuration>