A management system including a network device provided in a customer environment, a monitoring apparatus, and a management server provided outside the customer environment is provided. When it is determined that an agreement has been obtained from a customer based on a customer status contained in status information acquired from the management server, the monitoring apparatus acquires setting information necessary for a monitoring operation from the management server to start the monitoring operation according to other content contained in the acquired status information. In one or more embodiments, the monitoring apparatus acquires the setting information only when it is determined that the agreement has been obtained from the customer.