PrincipalSearcher.FindAll()和GroupPrincipal.FindByIdentity()之间的区别

Question

我试图从远程主机获取本地组的所有成员.我找到了一种使用System.DirectoryServices.AccountManagement命名空间的方法,但最终出现了不一致...

• GroupPrincipal.FindByIdentity返回仅包含组的本地成员的组对象
• PrincipalSearcher.FindAll返回一个包含组的所有成员的组对象(Domain + Local)

使用PrincipalSearcher.FindAll(参见下文),我获得了一个组的所有成员(Domain + Local).

输出:

• 成员:荷马 - S-1-5-21-4017887476-2895526723-3552248342-500
• 成员:smithers - S-1-5-21-4017887476-2895526723-3552248342-1009
• 成员:Domain Admins - S-1-5-21-452759756-260371901-2912106767-512
• 成员:SomeAdminGroup - S-1-5-21-452759756-260371901-2912106767-1154
• 成员:史密瑟斯 - S-1-5-21-452759756-260371901-2912106767-1124

码:

 using (var machineContext = new PrincipalContext(ContextType.Machine, hostname))
 using (var gpSeach = new PrincipalSearcher(new GroupPrincipal(machineContext)))
 {
      foreach (GroupPrincipal gp in gpSeach.FindAll().Where(gp => gp.SamAccountName == "Administrators"))
      {
           foreach (var member in gp.Members)
           {
                Trace.WriteLine("Member: " + member.Name+ " - " + member.Sid);
           }
      }
  }

使用GroupPrincipal.FindByIdentity,我只获取组的本地成员:

输出:

• 成员:荷马 - S-1-5-21-4017887476-2895526723-3552248342-500
• 成员:smithers - S-1-5-21-4017887476-2895526723-3552248342-1009

码:

 using (var machineContext = new PrincipalContext(ContextType.Machine, hostname, null, ContextOptions.Negotiate, "myUsername", "myPassword"))
 using (GroupPrincipal localAdminGp = GroupPrincipal.FindByIdentity(machineContext, IdentityType.Name, "Administrators"))
 {
     foreach (var member in localAdminGp.Members)
     {
          Trace.WriteLine("Member: " + member.Name + " - " + member.Sid);
     }
 }

在窗帘下发生了什么来获得这两种不同的结果!？!