I have configured a PDC with SAMBA et LDAP and have to manage users
by country and department. But i dont know how to organize my

Actually my LDAP root is domain.net, followed by OUs Users, Groups,
and Computers. Into Groups I have several OUs corresponding to
well-known Active Directory groups (Domain Admins, etc...). All of this
OUs havebeen created by smbldap-tools.

How to modify my LDAP tree to manage rights of my users by department
and by country?