The nsswitch map is used to request that the home directory be obtained from a password database, such as the local, NIS, or LDAP database. If an AD path is appended, it is used to publish shares.
Like the “catch-all” entry, the nsswitch map is only searched if an appropriate rule is not matched by another map entry.
The wildcard and nsswitch rules are mutually exclusive. Do not include an nsswitch rule if a wildcard rule has already been defined.