As I know, LDAP it's a standard protocol to access a user database on a server. I also read that by using LDAP you can read and write on this database. In my case, I only have read permissions and I'm not allowed to see the database internal structure neither to change it. I've tried to get it work but it doesn't and don't know why. I Just create a schema as follows: LDAP Server: ldap.myorganization.ch Login name attribute: uid RDN Attribute: Canonical name Users base DN: ou=student,o=myorganization,c=ch Scope: Subtree Group storage: Groups not stored on LDAP server Groups Base DN: same as Users base DN (I don't know what else can I put here and I don't have more info) LDAPLogin and Pasword are empty User object classes: top,person User password encryption: crypt Default User Roles: Anonymous Authentication: Basic HTTP Authentication Next I added the group student and assigned it my local Zope role Student. My question is how can I populate my user folder? I saw the feature add user, but I need to add 500 hundred users and I guess this is not the way of doing it and I don't see anythin on the Caches tab. My logic says my that this feature is only if you want to add users to your ldap database. But I rather than add want to authenticate them. Because I don't have any result when I search by uid, I just made this: <dtml-in "findUser('sn','lastname')"> <dtml-var "_['sequence-item']"> </dtml-in> And then I saw a dictionary with lots of fields, but not uid. I'm just wondering why. I guess the authentication looks for this username and then gives the password. Whenever I observe the log contents, I see always somethin like: (9) Apr 29 20:37:55: userx not found (getUser) Does anybody know what I'm doing wrong? Thanks in advanced, Josef.