Hi @sirko_6724,
Which OpenLDAP-based server are you currently using? We have seen that most OpenLDAP-based servers tend to use different attributes based on their configuration. By default we use the values suggested by OpenLdap, but you may need to modify them to suite your setup. With that said, ProGet looks up both ways; get groups from the user and get users for the group. In most operations, ProGet will first find the user, then load their groups, and then check if the user or user's groups for permissions.
Typically the starting point is verify the LDAP attributes and queries are correct for your OpenLDAP based server. Can you also share what you have configured for your LDAP attributes and LDAP queries?
Thanks,
Dan