This parameter is designed to allow Samba servers that are members of a Samba controlled domain to use UNIX accounts distributed vi NIS, rsync, or LDAP as the uid's for winbindd users in the hosts primary domain. Therefore, the user 'SAMBA\user1' would be mapped to the account 'user1' in /etc/passwd instead of allocating a new uid for him or her. Default: winbind trusted domains only = <no>