A relay apparatus detects a request, sent from a communication apparatus, to grant an access authority for a desired resource, sends, in the case where the request to grant the access authority has been detected, an authorization request requesting the granting of the access authority to a server, receives an authorization response, which is a response to the authorization request, from the server, saves the authorization response, generates an authorization relay response based on the authorization response, and sends the authorization relay response to the communication apparatus, wherein in the case where a request to grant the access authority sent from another communication apparatus different from the communication apparatus has been detected, the relay apparatus sends the authorization relay response in response to the request to the other communication apparatus based on the saved authorization response.