I have problem with samba PDC install. I use simple tdb storage. The problem is in expanding group membership. For example if I log like administrator, that is a member of Domain Admins (I checked) on samba, I do not get permissions for this role. I see this in log file [2005/10/29 15:53:16, 0] rpc_server/srv_samr.c:api_samr_query_usergroups(520) api_samr_query_usergroups: unable to marshall SAMR_R_QUERY_USERGROUPS. [2005/10/29 15:53:16, 0] rpc_server/srv_pipe.c:api_rpcTNP(2187) api_rpcTNP: samr: SAMR_QUERY_USERGROUPS failed. I use samba 3.0.20b, but I also tried with other versions, but its the same. I also deleted mappings file and recreated mappings several times. It seems like that when I check on server its ok (net rpc group members "Domain Admins" -Uroot%pass), but from the client fails. Regards, Gregor