LDAP_OPT_REFERRALS

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Use the LDAP_OPT_REFERRALS setting to specify whether the LDAP library automatically follows referrals that are returned by LDAP servers or not.

The API can be set to one of the constants LDAP_OPT_ON or LDAP_OPT_OFF. By default, the LDAP client follows referrals. For example: 
  int value;
  ldap_set_option( ld, LDAP_OPT_REFFERALS, (void *)LDAP_OPT_ON);
  ldap_get_option( ld, LDAP_OPT_REFFERALS, &value);