The LDAP_SERVER_FAST_BIND_OID is used internally by the LDAP_OPT_FAST_CONCURRENT_BIND session option to put an LDAP connection into fast bind mode.
The LDAP_SERVER_FAST_BIND_OID, defined as "1.2.840.1135220.127.116.111", identifies an LDAP extended request that puts an LDAP connection into fast bind mode. This mode is intended for use by server applications that use LDAP as to authenticate clients. During a normal bind the LDAP server checks the credentials and then determines all the groups that the client is a member of to perform further authorization. Fast bind mode is a way of skipping the group evaluation step if LDAP is only used to verify a client's credentials. Only simple binds are accepted on a connection in this mode. Because no group evaluation is done the connection is always treated as if no bind had occurred for the purposes of all other LDAP operations.
This OID is used internally by the LDAP client API. To place an Active Directory server in fast bind mode, the LDAP_OPT_FAST_CONCURRENT_BIND session option should be used. For more information about using this session option, see Using Concurrent Binding.