Powershell expand

function getMemberExpanded
{
        param ($dn)

	$colOfMembersExpanded =@()
        $adobject = [adsi]"LDAP://$dn"
        $colMembers = $adobject.properties.item("member")
        Foreach ($objMember in $colMembers)
        {
                $objMembermod = $objMember.replace("/","\/")
                $objAD = [adsi]"LDAP://$objmembermod"
                $attObjClass = $objAD.properties.item("objectClass")
                if ($attObjClass -eq "group")
                {
			getmemberexpanded $objMember    
			write-host "group: $objMember"
                }   
                else
                {
			$colOfMembersExpanded += $objMember
		}
        }    

}    


getMemberExpanded "CN=Domain Admins,CN=Users,DC=domain,DC=ext"