C# 服务器不愿意处理对ActiveDirectory的请求

我尝试在广告中创建一个用户

现在，我得到一个错误：

0000052D:SvcErr:DSID-031A1248，问题5003（将不执行），数据0

服务器不愿意处理该请求

翻译：El servidor没有律师资格

我的实际遗留代码（主片段）：

注意：

newUser.CommitChanges（）

抛出错误

现在，如果我尝试使用System.DirectoryServices.AccountManagement可以

工作。没有错误，一切正常

         string OuDnDES = "OU=Portal,OU=NSI DESARROLLO,DC=company,DC=net";
        using (var pc = new System.DirectoryServices.AccountManagement.PrincipalContext(System.DirectoryServices.AccountManagement.ContextType.Domain,
            "mydomain.net",OuDnDES, "mydomain\\DES_GestorDirectorio", "1234"))
        {
            using (var up = new System.DirectoryServices.AccountManagement.UserPrincipal(pc))
            {
                up.SamAccountName = "testAD001";
                up.EmailAddress = "test@realexx.es";
                up.SetPassword("Change$123");
                up.Enabled = true;
                up.ExpirePasswordNow();
                up.Save();
            }
        }

我不能使用System.DirectoryServices.AccountManagement，我的旧版NET 3.5

有什么建议吗？
该错误通常意味着未设置所创建对象的某些必需属性。尝试设置sAMAccountName属性

    SearchResult ret = searcher.FindOneReturningDirectorySearchResult();
    if (ret == null)
        throw new ObjectNotFoundException("group", searcher.GetFilter());
    using (DirectoryEntry parent = ret.GetDirectoryEntry())
    {
        parent.RefreshCache();
        using (DirectoryEntry newUser = parent.Children.Add("CN=" + this.CommonName, CommonPropertyNames.ObjectClassNames.UserObjectClassName))
        {
            Utility.SetProperty(newUser, UserPropertyNames.Name, this.CommonName);
            Utility.SetProperty(newUser, "userPassword", "Cambia$123");
            Utility.SetProperty(newUser, "sAMAccountName", "testAD001");
            FillUserProperties(newUser);
            newUser.CommitChanges();

    SearchResult ret = searcher.FindOneReturningDirectorySearchResult();
    if (ret == null)
        throw new ObjectNotFoundException("group", searcher.GetFilter());
    using (DirectoryEntry parent = ret.GetDirectoryEntry())
    {
        parent.RefreshCache();
        using (DirectoryEntry newUser = parent.Children.Add("CN=" + this.CommonName, CommonPropertyNames.ObjectClassNames.UserObjectClassName))
        {
            Utility.SetProperty(newUser, UserPropertyNames.Name, this.CommonName);
            Utility.SetProperty(newUser, "userPassword", "Cambia$123");
            Utility.SetProperty(newUser, "sAMAccountName", "testAD001");
            FillUserProperties(newUser);
            newUser.CommitChanges();