Finding users that are members of two active directory groups

Question

I need to find all users that are members of two groups (GroupA and GroupB). I also need to take into account nested groups. What is the best way to do this?

I kno

Answer 1

Here is something working in an ActiveDirectory 2003 ans 2008 R2. I use Microsoft LDAP_MATCHING_RULE_IN_CHAIN to :

1) Search recursively (but in one query) all the users from the first group (be careful it return users from security and distributions group)

2) For each user from the first query, I again search recursively (but in one query) if the user belongs to the second group.

static void Main(string[] args)
{
  //Connection to Active Directory
  string sFromWhere = "LDAP://SRVENTR2:389/dc=societe,dc=fr";
  DirectoryEntry deBase = new DirectoryEntry(sFromWhere, "societe\\administrateur", "test.2011");

  // To find all the users member of groups "Grp1"  :
  // Set the base to the groups container DN; for example root DN (dc=societe,dc=fr) 
  // Set the scope to subtree
  // Use the following filter :
  // (member:1.2.840.113556.1.4.1941:=CN=Grp1,OU=MonOu,DC=X)
  //
  DirectorySearcher dsLookFor = new DirectorySearcher(deBase);
  dsLookFor.Filter = "(&(memberof:1.2.840.113556.1.4.1941:=CN=Grp1,OU=MonOu,DC=societe,DC=fr)(objectCategory=user))";
  dsLookFor.SearchScope = SearchScope.Subtree;
  dsLookFor.PropertiesToLoad.Add("cn");

  SearchResultCollection srcUsers = dsLookFor.FindAll();

  // Just to know if user is present in an other group
  foreach (SearchResult srcUser in srcUsers)
  {
    Console.WriteLine("{0}", srcUser.Path);

    // To check if a user "user1" is a member of group "group1".
    // Set the base to the user DN (cn=user1, cn=users, dc=x)
    // Set the scope to base
    // Use the following filter :
    // (memberof:1.2.840.113556.1.4.1941:=(cn=Group1,OU=groupsOU,DC=x))
    DirectoryEntry deBaseUsr = new DirectoryEntry(srcUser.Path, "societe\\administrateur", "test.2011");
    DirectorySearcher dsVerify = new DirectorySearcher(deBaseUsr);
    dsVerify.Filter = "(memberof:1.2.840.113556.1.4.1941:=CN=Grp3,OU=MonOu,DC=societe,DC=fr)";
    dsVerify.SearchScope = SearchScope.Base;
    dsVerify.PropertiesToLoad.Add("cn");

    SearchResult srcTheUser = dsVerify.FindOne();

    if (srcTheUser != null)
    {
      Console.WriteLine("Bingo {0}", srcTheUser.Path);
    }
  }
  Console.ReadLine();
}