using System;
using System.Collections;
using System.Linq;
using System.Text;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;

namespace RemoveFromDistributionGroups
{
    class Program
    {
        private static string sDomain;
        private static string sDefaultOU;
        private static string sServiceUser;
        private static string sServicePassword;

        static void Main(string[] args)
        {
            try
            {
                Console.Write("Type your Domain (i.e: yourcompany.com) ");
                sDomain = Console.ReadLine();

                Console.Write("Type the OU you want to use: (i.e: OU=yourou,DC=yourcompany,DC=com)");
                sDefaultOU = Console.ReadLine();

                Console.Write(@"Username: (i.e.: YOURDOMAIN\Raymund )");
                sServiceUser = Console.ReadLine();

                Console.Write("Password: ");
                sServicePassword = Console.ReadLine();


                foreach (UserPrincipal user in GetAllUsers())
                {
                    Console.WriteLine("Processing User : " + user.Name);
                    foreach (GroupPrincipal group in GetUserGroups(user))
                    {
                        if (group.IsSecurityGroup == false) //Distribution Group
                        {
                            group.Members.Remove(user);
                            group.Save();
                        }
                    }
                }

                Console.WriteLine("Done! Press a key to exit");
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error Encountered : " + ex.Message);
                Console.WriteLine("Press a key to exit");
                Console.ReadLine();
            }
        }
        public static PrincipalContext GetPrincipalContext(string sOU)
        {
            PrincipalContext oPrincipalContext = new PrincipalContext(ContextType.Domain, sDomain, sOU, ContextOptions.Negotiate, sServiceUser, sServicePassword);
            return oPrincipalContext;
        }
        public static ArrayList GetAllUsers()
        {
            ArrayList myItems = new ArrayList();
            PrincipalSearcher oPrincipalSearcher = new PrincipalSearcher();


            UserPrincipal oUserPrincipal = new UserPrincipal(GetPrincipalContext(sDefaultOU));

            oUserPrincipal.SamAccountName = "*";
            oUserPrincipal.Enabled = true;

            oPrincipalSearcher.QueryFilter = oUserPrincipal;
            ((DirectorySearcher)oPrincipalSearcher.GetUnderlyingSearcher()).PageSize = 5000;

            PrincipalSearchResult<Principal> oPrincipalSearchResults = oPrincipalSearcher.FindAll();
            foreach (Principal oResult in oPrincipalSearchResults)
            {
                myItems.Add(oResult);
            }

            return myItems;
        }
        public static ArrayList GetUserGroups(UserPrincipal oUserPrincipal)
        {
            ArrayList myItems = new ArrayList();

            PrincipalSearchResult<Principal> oPrincipalSearchResult = oUserPrincipal.GetGroups();

            foreach (Principal oResult in oPrincipalSearchResult)
            {
                myItems.Add(oResult);
            }
            return myItems;

        }

    }
}