When user is in more than 15 groups, user can't log to samba share with error NT_STATUS_NO_SUCH_USER. "dmesg -a" portion follows: Mar 31 18:10:53 srv1 smbd[51390]: [2008/03/31 18:10:53, 0] lib/system_smbd.c:getgroups_unix_user(172) Mar 31 18:10:53 srv1 smbd[51390]: get_user_groups: failed to get the unix group list Mar 31 18:10:53 srv1 smbd[51390]: [2008/03/31 18:10:53, 0] auth/auth_sam.c:check_sam_security(352) Mar 31 18:10:53 srv1 smbd[51390]: check_sam_security: make_server_info_sam() failed with 'NT_STATUS_NO_SUCH_USER'
This is not a Samba bug but a FreeBSD limitation. With Linux 2.6 a user can be in 64k groups, BSDs arbitrarily limit this. Volker