Question

When i run the code below to retrieve all groups, subgroups and related users i get a strange error after retrieving some records :
I’m expecting to retrieve 90000 Group/subgroup and 250000 users

Error:

System.Runtime.InteropServices.COMException was caught Message=The
server is not operational

 public static List<Group>getUsers()
{

    // create the "context" in which to operate - your domain here, 
    // as the old-style NetBIOS domain, and the container where to operate in
    PrincipalContext ctx = new PrincipalContext(ContextType.Domain, "lin.proximus.com");

    // define a "prototype" - an example of what you're searching for
    // Here: just a simple GroupPrincipal - you want all groups
    GroupPrincipal prototype = new GroupPrincipal(ctx);

    // define a PrincipalSearcher to find those principals that match your prototype
    PrincipalSearcher searcher = new PrincipalSearcher(prototype);

    // define a list of strings to hold the group names        
    List<Group> groupNames = new List<Group>();
    int counter = 0;
    // iterate over the result of the .FindAll() call
    foreach (var gp in searcher.FindAll())
    {

        // cast result to GroupPrincipal
        GroupPrincipal groupPrincipal = gp as GroupPrincipal;

        // if everything - grab the group's name and put it into the list
        if (groupPrincipal == null) continue;

        Group group = new Group();
        group.Name = groupPrincipal.Name;
        group.Description = groupPrincipal.Description;
        AddSubGroups(groupPrincipal, ref group);
        AddMemebers(groupPrincipal, ref group);
        counter++;
        groupNames.Add(group);
        Console.WriteLine(counter);
        if (counter > 10000)
            return groupNames;
    }
    return groupNames;
}

private static void AddSubGroups(GroupPrincipal gp,ref Group gr)
{
    gr.SubCounts = 0;
    if (gp.GetGroups().Count() <= 0) return;

    gr.SubCounts = gp.GetGroups().Count();
    gr.SubGroups = new List<string>();
    foreach (var principal in gp.GetGroups())
    {
        gr.SubGroups.Add(principal.Name);
    }
}

private static void AddMemebers(GroupPrincipal gp, ref Group gr)
{
    if (gp.GetMembers().Count() <= 0) return;

    gr.Users = new List<string>();

    foreach (Principal principal in gp.GetMembers())
    {
        gr.Users.Add(principal.Name);
    }
}

Any Idea?

Answer 1

Looks like you could set the DirectorySearcher.PageSize and do a paged results set. This will typically allow you to beat the server side limit.

I would still try a known LDAP tool (I like Apache Studio) and see if it works. (directory.apache.org/studio)