Question

The code below works just fine, however what’s happening is the code limits the results to 1500 users and we have more than 1500 users. What I’m trying to do is retrieve a list of all users that are a member of a specific group. I know DirectorySearcher has a PageSize setting however, I’m unable to find a way to set DirectoryEntry PageSize will still only pulling members of that group.

Does anybody know a way to change the page size? Or maybe how to pull members of a specific group in another fashion that will accommodate pagesize?

DirectoryEntry dEntryhighlevel = new DirectoryEntry("LDAP://CN=Users,OU=MyOu,OU=Clients,OU=Home,DC=bridgeTech,DC=net");
foreach (object dn in dEntryhighlevel.Properties["member"])
{
    DirectoryEntry singleEntry = new DirectoryEntry("LDAP://" + dn);
    DirectorySearcher dSearcher = new DirectorySearcher(singleEntry);
    //filter just user objects
    dSearcher.SearchScope = SearchScope.Base;
    //dSearcher.Filter = "(&(objectClass=user)(dn=" + dn + "))";
    //dSearcher.PageSize = 1000;
    SearchResult singleResult = null;
    singleResult = dSearcher.FindOne();
    if (singleResult != null)
    {
        string Last_Name = singleResult.Properties["sn"][0].ToString();
        string First_Name = singleResult.Properties["givenname"][0].ToString();
        string userName = singleResult.Properties["samAccountName"][0].ToString();
        string Email_Address = singleResult.Properties["mail"][0].ToString();
        OriginalList.Add(Last_Name + "|" + First_Name + "|" + userName + "|" + Email_Address);
    }
    singleEntry.Close();
}

Answer 1

I’m working on something similar to this at the moment and noticed that your code differs to mine slightly. I haven’t had any issues with limited results using the following code structure:

DirectoryEntry dEntryhighlevel = new DirectoryEntry("LDAP://CN=Users,OU=MyOu,OU=Clients,OU=Home,DC=bridgeTech,DC=net");
DirectorySearcher dSearcher = new DirectorySearcher();
//filter just user objects
dSearcher.Filter = "(objectClass=user)";
dSearcher.PageSize = 1000;
SearchResultCollection resultCollection = dirSearcher.FindAll();
foreach (SearchResult userResults in resultCollection )
{
    string Last_Name = userResults .Properties["sn"][0].ToString();
    string First_Name = userResults .Properties["givenname"][0].ToString();
    string userName = userResults .Properties["samAccountName"][0].ToString();
    string Email_Address = userResults .Properties["mail"][0].ToString();
    OriginalList.Add(Last_Name + "|" + First_Name + "|" + userName + "|" + Email_Address);
}

That should return all your users. You’ll need to use LDAP search patterns in your dSearcher.Filter in order to narrow users down to a specific group – see this link for some additional help with that.