Your SMB server can use directory-based mapping, rule-based mapping, both, or neither. By default, Windows users and groups do not need to be associated with Oracle Solaris users and groups. Without any mapping, Windows users and groups can still own files, be listed in ACLs, and such. Identity mapping is required only when users need access to files from both Windows and Oracle Solaris operating systems or NFS. These mappings enable a user to be treated the same whether locally logged in or connected from a Windows system or through NFS.
If your Windows environment includes a parallel Oracle Solaris naming service infrastructure, such as NIS, consider using name-based mappings to associate Windows users with Oracle Solaris users, and Windows groups with Oracle Solaris groups.
A directory-based mapping uses name mapping information that is stored in user or group objects in the Active Directory (AD), in the native LDAP directory service, or both, to map users and groups.