OID value: 1.3.6.1.1.1.2.1
OID description:
Additional attributes for shadow passwords
MUST uid
MAY ( userPassword $ shadowLastChange $ shadowMin $
shadowMax $ shadowWarning $ shadowInactive $
shadowExpire $ shadowFlag $ description )
URL for further info: http://www.cis.ohio-state.edu/htbin/rfc/rfc2307.html
See also the OID Repository website reference for 1.3.6.1.1.1.2.1