I have recently run across this problem and would like to warn people about it. I had an already established domain running under Samba 2.2.8. I then upgraded to 3.0. I removed the 'domain admin users = root' line from my smb.conf because certain tools complained about it being there. After the upgrade, I followed the Samba 3 HOWTO docs on samba.org. I created my domadm, domguests, and domusers groups. I used the command 'net groupmap add ntgroup="Domain Admins" UNIXgroup=domadm' to map the groups together. This should have had the same effect as having the 'domain admin users = root' line in 2.2.8, but whenever I would logon to any computer in the domain with the user 'root', the user would be a regular restricted user. I got output like this from 'net groupmap list': System Operators (S-1-5-32-549) -> -1 Dispatch (S-1-5-21-124999916-2847287174-2328787173-1831) -> dispatch Replicators (S-1-5-32-552) -> -1 Guests (S-1-5-32-546) -> -1 Domain Users (S-1-5-21-124999916-2847287174-2328787173-1833) -> domusers Domain Admins (S-1-5-21-124999916-2847287174-2328787173-1825) -> domadm Domain Guests (S-1-5-21-124999916-2847287174-2328787173-1835) -> domguests Mechanics (S-1-5-21-124999916-2847287174-2328787173-1827) -> mech Instructors (S-1-5-21-124999916-2847287174-2328787173-1837) -> instructors Accounting (S-1-5-21-124999916-2847287174-2328787173-1829) -> accounting Domain Admins (S-1-5-21-124999916-2847287174-2328787173-512) -> -1 Domain Guests (S-1-5-21-124999916-2847287174-2328787173-514) -> -1 Domain Users (S-1-5-21-124999916-2847287174-2328787173-513) -> -1 Power Users (S-1-5-32-547) -> -1 Print Operators (S-1-5-32-550) -> -1 Administrators (S-1-5-32-544) -> -1 Account Operators (S-1-5-32-548) -> -1 Backup Operators (S-1-5-32-551) -> -1 Users (S-1-5-32-545) -> -1 Apparently, the default groups already existed, but were not used in the mapping. Instead, new groups with the same name (but not the same GID) were created and mapped. So, my user was in the Domain Admins group but not THE Domain Admins group. I'm not quite sure if this is a flaw in the HOWTO or if this only happens when upgrading from 2.2.x. I was able to fix this problem by deleting the group mappings and remapping with 'net groupmap modify ntgroup="Domain Admins" UNIXgroup=domadm'. I just made these changes, but I am not on site to test if they worked, but I have a hunch that they did. -- Andrew Gaffney