Please help. I've been searching for days, trying nearly everything I can find that seems relevant, but I can't get this working. I am able to create users, login to Windows systems joined to the SAMBA domain as those users, but filesystem ACLs on Windows Domain Member Servers do not work which I suspect is due to my IDMAP OU is empty. wbinfo -u returns "Error looking up domain users" wbinfo -g returns: BUILTIN/administrators BUILTIN/users wbinfo -t returns "checking the trust secret via RPC calls succeeded" getent passwd -and- getent group list all my local and domain users and groups respectively. When running wbinfo -u my log.winbindd shows: [2008/12/26 12:24:52, 10] nsswitch/winbindd.c:process_request(314) process_request: request fn SID_TO_GID [2008/12/26 12:24:52, 3] nsswitch/winbindd_sid.c:winbindd_sid_to_gid(308) [23999]: sid to gid S-1-5-32-546 [2008/12/26 12:24:52, 10] nsswitch/winbindd_util.c:find_lookup_domain_from_sid(673) find_lookup_domain_from_sid(S-1-5-32-546) [2008/12/26 12:24:52, 10] nsswitch/winbindd_util.c:find_lookup_domain_from_sid(676) calling find_domain_from_sid [2008/12/26 12:24:52, 10] nsswitch/winbindd_cache.c:cache_retrieve_response(2300) Retrieving response for pid 23794 [2008/12/26 12:24:52, 5] nsswitch/winbindd_async.c:lookupsid_recv(706) lookupsid returned an error [2008/12/26 12:24:52, 5] nsswitch/winbindd_sid.c:sid2gid_lookupsid_recv(274) sid2gid_lookupsid_recv: Could not convert get sid type for S-1-5-32-546 [2008/12/26 12:24:52, 10] nsswitch/winbindd.c:process_request(314) process_request: request fn PING [2008/12/26 12:24:52, 3] nsswitch/winbindd_misc.c:winbindd_ping(470) [23999]: ping smbldap-tools seem to function correctly net commands seem to function correctly. Any idea where the problem might be? Thank you! Ubuntu 8.04 LTS Samba 3.0.28a OpenLDAP 2.4.9 smb.conf: [global] unix charset = LOCALE workgroup = VOICECURVE server string = %h server (Samba, Ubuntu) map to guest = Bad User passdb backend = ldapsam passwd program = /usr/sbin/smbldap-passwd %u passwd chat = *New*password* %n\n *Retype*new*password* %n\n *all*authentication*tokens*updated* log level = 3 passdb:5 auth:10 winbind:10 syslog = 0 log file = /var/log/samba/log.%m max log size = 1000 time server = Yes add user script = /usr/sbin/smbldap-useradd -m "%u" delete user script = /usr/sbin/smbldap-userdel "%u" add group script = /usr/sbin/smbldap-groupadd -p -a "%g" delete group script = /usr/sbin/smbldap-groupdel "%g" add user to group script = /usr/sbin/smbldap-groupmod -m "%u" "%g" delete user from group script = /usr/sbin/smbldap-groupmod -x "%u" "%g" set primary group script = /usr/sbin/smbldap-usermod -g "%g" "%u" add machine script = /usr/sbin/smbldap-useradd -w "%u" logon path = domain logons = Yes os level = 35 domain master = Yes dns proxy = No wins support = Yes ldap admin dn = cn=admin,dc=voicecurve,dc=com ldap delete dn = Yes ldap group suffix = ou=Groups ldap idmap suffix = ou=Idmap ldap machine suffix = ou=Computers ldap passwd sync = Yes ldap suffix = dc=voicecurve,dc=com ldap user suffix = ou=Users usershare allow guests = Yes panic action = /usr/share/samba/panic-action %d idmap domains = VOICECURVE idmap alloc backend = ldap winbind separator = / winbind enum users = Yes winbind enum groups = Yes idmap alloc config:range = 10000 - 10000000 idmap alloc config:ldap_url = ldap://localhost/ idmap alloc config:ldap_user_dn = cn=admin,dc=voicecurve,dc=com idmap alloc config:ldap_base_dn = ou=idmap,dc=voicecurve,dc=com idmap config VOICECURVE:range = 10000 - 10000000 idmap config VOICECURVE:ldap_url = ldap://localhost/ idmap config VOICECURVE:ldap_user_dn = cn=admin,dc=voicecurve,dc=com idmap config VOICECURVE:ldap_base_dn = ou=idmap,dc=voicecurve,dc=com idmap config VOICECURVE:backend = ldap idmap config VOICECURVE:default = yes ldapsam:editposix = yes ldapsam:trusted = yes nsswitch.conf: passwd: compat ldap group: compat ldap shadow: compat ldap hosts: files dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis