Получить адрес и имя динамической группы рассылки Active Directory

GroupPrincipal GrPr = new GroupPrincipal(AD_String);
PrincipalSearcher P_Searcher = new PrincipalSearcher(GrPr);
foreach (var result in P_Searcher.FindAll())
{
DirectoryEntry dir_E = result.GetUnderlyingObject() as DirectoryEntry;
Group_Mail = ("" + dir_E .Properties["mail"].Value);
Group_Name = ("" + dir_E .Properties["cn"].Value);
}

    // via https://stackoverflow.com/q/53431322
 
    /// <summary>
    /// Get the List of A dynamic distribution Group in Key Value Pairs 
    /// the key is the CN
    /// the value is the filter for the membership of that group
    /// </summary>
    /// <returns>Dictionary of strings </returns>
    public List<DistributionList> GetDynamicDistributionLists(string strEmailAddress)
    {
        List<DistributionList> distributionLists = new List<DistributionList>();
        DomName = "dc=" + Settings.ImpersonatedUserDomain.Replace(".", ",dc=");
 
        using(var group = new DirectoryEntry("GC://" + DomName))
        {
 
            using(var searchRoot = new DirectoryEntry("GC://" + Settings.GlobalCatalogServer + "/" + DomName))
            using(var searcher = new DirectorySearcher(searchRoot, "(&(ObjectClass=msExchDynamicDistributionList)(proxyAddresses=smtp:" + strEmailAddress.Trim() + "))"))
            using(var results = searcher.FindAll())
            {
                foreach(SearchResult result in results)
                {
                    if(result.Properties.Contains("cn") && result.Properties.Contains("msExchDynamicDLFilter"))
                    {
                        DistributionList dl = new DistributionList();
 
                        dl.DType = DLT.DDL;
                        dl.CN = result.Properties["cn"][0].ToString();
                        dl.FILORDN = result.Properties["msExchDynamicDLFilter"][0].ToString();
 
                        distributionLists.Add(dl);
                    }
                }
            }
 
        }
 
        return distributionLists;
 
    }

            DirectoryEntry dirEntry = new DirectoryEntry(имя_домена);
            {
                using (var search = new DirectorySearcher(dirEntry, "(&(ObjectClass=msExchDynamicDistributionList))"))
                using (var results = search.FindAll())
                {
                    foreach (SearchResult result in results)
                    {
                        DirectoryEntry userEntry = result.GetDirectoryEntry();
                        //как пример вывода в Label
                        Label1.Text = Label1.Text + "<br/>"+("" + userEntry.Properties["cn"].Value) + "//" + ("" + userEntry.Properties["mail"].Value);
                    }
                }
            }