emqx4.3/plugins/emqttd_auth_ldap/etc/plugin.config

[
 {emqttd_auth_ldap, [
    {servers, ["localhost"]},
    {port, 389},
    {timeout, 30},
    {user_dn, "uid=$u,ou=People,dc=example,dc=com"},
    {ssl, fasle},
    {sslopts, [
        {"certfile", "ssl.crt"},
        {"keyfile", "ssl.key"}]}
 ]}
].