How to get Active Directory Attributes not represented by the UserPrincipal class

Question

What I mean is that right now I am using System.DirectoryServices.AccountManagement and if I use UserPrincipal class I only see the Name, Middle Name, etc

so in my c

Answer 1

The proper way of doing it is by using PrincipalExtensions where you extend the Principal you are after and use the methods ExtensionSet and ExtensionGet as explained here.

Answer 2

up.Mobile would be perfect, but unfortunately, there's no such method in the UserPrincipal class, so you have to switch to DirectoryEntry by calling .GetUnderlyingObject().

static void GetUserMobile(PrincipalContext ctx, string userGuid)
{
    try
    {
        UserPrincipal up = UserPrincipal.FindByIdentity(ctx, IdentityType.Guid, userGuid);
        DirectoryEntry up_de = (DirectoryEntry)up.GetUnderlyingObject();
        DirectorySearcher deSearch = new DirectorySearcher(up_de);
        deSearch.PropertiesToLoad.Add("mobile");
        SearchResultCollection results = deSearch.FindAll();
        if (results != null && results.Count > 0)
        {
            ResultPropertyCollection rpc = results[0].Properties;
            foreach (string rp in rpc.PropertyNames)
            {
                if (rp == "mobile")
                    Console.WriteLine(rpc["mobile"][0].ToString());
            }
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.ToString());
    }
}

Answer 3

In this case, you need to go one level deeper - back into the bowels of DirectoryEntry - by grabbing it from the user principal:

using (DirectoryEntry de = myUser.GetUnderlyingObject() as DirectoryEntry)
{
    if (de != null)
    {
        // Go for those attributes and do what you need to do...
        var mobile = de.Properties["mobile"].Value as string;
        var info = de.Properties["info"].Value as string;
    }
}