This parameter is designed to allow Samba servers that are members of a Samba controlled domain to use UNIX accounts distributed via NIS, rsync, or LDAP as the uid's for winbindd users in the hosts primary domain. Therefore, the user DOMAIN\user1 would be mapped to the account user1 in /etc/passwd instead of allocating a new uid for him or her. This parameter is now deprecated in favor of the newer idmap_nss backend. Refer to the smb.conf option and the idmap_nss 8 man page for more information. no