Hello, I use Samba 3.0.14a acting as simple PDC (using tdbsam), ext3 acls and kernel 2.6.5. All work fine What is the correct configuration to obtain a maximum compatiblity with USRMGR ? : add user script = /usr/sbin/useradd -s /bin/false -d /dev/null %u add group script = /usr/sbin/groupadd %g add user to group script = /usr/sbin/usermod -G %g %u add machine script = /usr/sbin/useradd -s /bin/false -d /dev/null -g machines %u delete user script = /usr/sbin/userdel %u delete group script = /usr/sbin/groupdel %g delete user from group script = /usr/sbin/deluser %u %g with groupmaps : System Operators (S-1-5-32-549) -> -1 Domain Admins (S-1-5-21-1234032427-2839496750-1210694437-512) -> admins Secretariat (S-1-5-21-1234032427-2839496750-1210694437-5003) -> secretariat Replicators (S-1-5-32-552) -> -1 Guests (S-1-5-32-546) -> -1 Domain Guests (S-1-5-21-1234032427-2839496750-1210694437-514) -> nobody Finances (S-1-5-21-1234032427-2839496750-1210694437-3007) -> finances Power Users (S-1-5-32-547) -> -1 Domain Users (S-1-5-21-1234032427-2839496750-1210694437-513) -> users Print Operators (S-1-5-32-550) -> -1 Administrators (S-1-5-32-544) -> admins Stagiaires (S-1-5-21-1234032427-2839496750-1210694437-3009) -> stagiaires Account Operators (S-1-5-32-548) -> -1 Backup Operators (S-1-5-32-551) -> -1 Users (S-1-5-32-545) -> users Domain Computers (S-1-5-21-1234032427-2839496750-1210694437-3011) -> machines Technique (S-1-5-21-1234032427-2839496750-1210694437-3005) -> technique The problem is that doing operations on groups (changing primary group of a user, adding a user to a group, etc...) lead error messages and strange behaviour. For example, user joe is initially created with primary group "Domain Users" When I add another group "technique" and set it to its primary group, It works (set in tdbsam but not in /etc/group /etc/passwd) but when trying to deleted joe from "Domain Users", access is refused... Thx for help (not man or samba howto plz, I've already red them) Max