ExchangeServices.GetDelegates 的结果在通过 ECP 添加委托到邮箱时未反映更改

Question

注意： Exchange 2013 On-Premise 和 Exchange Online (Office 365) 都观察到此行为。

我正在尝试获取特定邮箱的代理人列表。如果使用 ExchangeServices.AddDelegates and ExchangeServices.RemoveDelegates - the DelegateInformation 对象添加或删除了这些代表，这将非常有效，我得到的对象包含作为代表添加的预期邮箱列表。

using Microsoft.Exchange.WebServices.Data;
using System;

namespace QueryDelegateAccess
{
    class Program
    {
        static void Main(string[] args)
        {
            try
            {
                ExchangeService service = InitializeService();
                string emailAddressToImpersonate = "MailboxWithDelegates@example.com";
                service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, emailAddressToImpersonate);
                Mailbox mailbox = new Mailbox(emailAddressToImpersonate);
                Console.WriteLine($"Mailboxes which have delegate access to '{emailAddressToImpersonate}':");
                // Every time I add or remove a delegate via ExchangeServices.AddDelegates or ExchangeServices.RemoveDelegates,
                // the change is reflected in the console output.
                while (true)
                {
                    DelegateInformation di = service.GetDelegates(mailbox, true);
                    foreach (DelegateUserResponse delegateMailbox in di.DelegateUserResponses)
                    {
                        if (delegateMailbox.Result != ServiceResult.Error)
                        {
                            Console.WriteLine(delegateMailbox.DelegateUser.UserId.DisplayName);
                        }
                    }
                    Console.WriteLine();
                    System.Threading.Thread.Sleep(2000);
                }
            }
            catch (Exception e)
            {
                Console.Error.WriteLine("An error has occurred: " + e);
            }
            finally
            {
                Console.WriteLine("Press any key to terminate the program.");
                Console.ReadKey();
            }
        }

        private static ExchangeService InitializeService()
        {
            ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2007_SP1);
            service.Credentials = new WebCredentials("MailboxWithImpersonationRole@example.com", "password");
            service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx"); // or retrieve Url via AutoDiscover if Exchange On-Premise
            return service;
        }
    }
}

但是，如果代理是通过 Exchange 控制面板（Exchange 管理员向邮箱添加代理的常用方法）添加的，方法是转到邮箱权限并在 "Send on behalf" 中添加代理部分，我得到的 DelegateInformation 对象不包含这个委托。仅当添加了代理人的邮箱所属的人启动 Outlook 并且通过 文件 > 帐户设置 > 代理访问.[=18 opens/closes 任何代理条目时才会更新列表=]

Screenshot of Outlook option

这种行为让我感到困惑，并让我认为我还缺少一个额外的 "flushing" 步骤。我需要做什么才能可靠地检索通过 ECP 添加的委托？

Answer 1

However, if the delegate has been added via the Exchange Control Panel (a common way for Exchange Admins to add a delegate to a mailbox) by going to the mailbox permissions and adding a delegate in the "Send on behalf" section, the DelegateInformation object I get does not contain this delegate.

Outlook Delegates 和您在 ECP 中所做的是两件不同的事情，例如，您在 ECP 中所做的只是授予另一个用户代表发送的权限。 Outlook 委托同时还包括该权限具有邮箱文件夹权限和潜在的日历转发规则。它是一个客户端驱动的进程，将配置信息存储在邮箱本身中，并且只能通过邮箱 API Create/deleted，而 ECP 任务只是修改基础 AD 权限属性。

ExchangeServices.GetDelegates 的结果在通过 ECP 添加委托到邮箱时未反映更改

Result of ExchangeServices.GetDelegates not reflecting change when adding delegate to mailbox via ECP

outlook

exchange-server

exchangewebservices

ews-managed-api

office365