HP CIFS Server 3.0f Administrator's Guide verison A.02.03

These routines in turn use the entries in the /etc/nsswitch.conf file to determine which name services
backend to use to obtain the information. When the winbind entry is specified in the /etc/nsswitch.conf
file, the /usr/lib/libnss_winbind.1 routine is called which interfaces with the winbind daemon,
winbindd, to translate the UID and GID back into the Windows SID, and then query the password server
for the user name associated with this SID.
An alternate method of Windows SID to UNIX UID and GID mappings can be done using the idmap_rid
facility. The idmap_rid facility with winbind provides a unique mapping of Windows SIDs to local UNIX
UIDs and GIDs throughout a domain without requiring an LDAP. You can use idmap_rid in a Windows
NT or a Windows 2000/2003 ADS domain. See “idmap Backend Support in Winbind” for details.
106 Winbind Support