[xwiki-users] Deny LDAP user auto creation

Hi everyone! I have just tried this fantastic wiki using the Windows EXE (v4.5) and I have to say I'm impressed. LDAP config just works out of the box and as stated in the config page: *Ldap **Enable or not LDAP authentication for this wiki. If enabled and configured properly, a local user will be created whenever a LDAP user visit this wiki for the first time.* What I really need is to manually disable local user creation from LDAP. I don't want anybody in the company to create a new user ;) I know I can restrict by LDAP groups but almost all users are in the same cn (I'm not the one who made it!). Do anyone has found a workaround for this? I haven't found any "disable ldap user creation" option. Thanks in advance!