**To show which event types are published** The following ``update-event-configurations`` example updates the configuration to enable messages when the CA certificate is added, updated, or deleted. :: aws iot update-event-configurations \ --event-configurations "{\"CA_CERTIFICATE\":{\"Enabled\":true}}" This command produces no output. For more information, see `Event Messages <https://docs.aws.amazon.com/iot/latest/developerguide/iot-events.html>`__ in the *AWS IoT Developer Guide*.