Can't lookup Domain Local Group

Hi all,

I have a problem while working on Active Directory, so could you please help me to resolve this problem

I have 2 domain: domain "ABC.LOCAL", domain "CHILD1.ABC.LOCAL", CHILD1 is child domain of ABC.LOCAL

In domain ABC.LOCAL, create an account ABC\testaccount and create a Domain Global Group ABC\parentgroup and add test account to this group.

In domain CHILD1.ABC.LOCAL, create a Domain Local Group CHILD1\parentgroup and add ABC\parentgroup to this group

After logon to a computer by using ABC\testaccount (Administrator permission), I use below source code to reading user security groups from Active Directory, but the result is missing all domain local groups.

private void GetAuthorizationGroups(ref Dictionary<SecurityIdentifier, Principal> arrGroup)
{
	UserPrincipal user = UserPrincipal.Current;
	PrincipalSearchResult<Principal> groups;

	groups = user.GetAuthorizationGroups();
	IEnumerator<Principal> iterGroup = groups.GetEnumerator();
	using (iterGroup)
	{
		while (iterGroup.MoveNext())
		{
			try
			{
				Principal p = iterGroup.Current;
				System.Diagnostics.Debug.WriteLine(string.Format("{0}[SID: {1}]", GetADPath(p.Sid), p.Sid));
				if (!arrGroup.ContainsKey(p.Sid))
				{
					arrGroup.Add(p.Sid, p);
				}
			}
			catch (Exception pex)
			{
				System.Diagnostics.Debug.WriteLine(pex.Message);
				continue;
			}
		}
	}
}

Thank you