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

class Program
{
    static void Main(string[] args)
    {
        // 创建Exchange服务对象
        ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2013_SP1);
        
        // 设置凭据（使用当前用户凭据或指定凭据）
        service.Credentials = new WebCredentials("username", "password", "domain");
        
        // 设置Exchange Web Services URL
        service.Url = new Uri("https://outlook.office365.com/EWS/Exchange.asmx");
        
        // 为其他用户创建任务
        CreateTaskForUser(service, "otheruser@domain.com", "项目评审", "完成季度项目评审报告", DateTime.Now.AddDays(3));
    }

    static void CreateTaskForUser(ExchangeService service, string targetMailbox, string subject, string body, DateTime dueDate)
    {
        try
        {
            // 设置模拟或委托访问
            service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, targetMailbox);
            
            // 创建任务项
            Task task = new Task(service);
            task.Subject = subject;
            task.Body = body;
            task.DueDate = dueDate;
            task.Status = TaskStatus.NotStarted;
            
            // 保存任务到目标用户的邮箱
            task.Save();
            
            Console.WriteLine($"成功为用户 {targetMailbox} 创建任务: {subject}");
        }
        catch (Exception ex)
        {
            Console.WriteLine($"创建任务时出错: {ex.Message}");
        }
    }
}

ServicePointManager.ServerCertificateValidationCallback = (sender, certificate, chain, sslPolicyErrors) => true;

task.ReminderDueBy = DateTime.Now.AddHours(24);
task.ReminderIsSet = true;

task.Categories.Add("工作");
task.Categories.Add("重要");

task.Importance = Importance.High;