OID value: 1.3.6.1.4.1.1466.101.120.15
OID description:
The values of this attribute are the versions of the LDAP protocol
which the server implements.
( 1.3.6.1.4.1.1466.101.120.15 NAME 'supportedLDAPVersion' SYNTAX 1.3.6.1.4.1.1466.115.121.1.27 USAGE dSAOperation )
URL for further info: http://src.doc.ic.ac.uk/computing/internet/rfc/rfc2252.txt
See also the OID Repository website reference for 1.3.6.1.4.1.1466.101.120.15