When a plurality of information processing apparatuses that have an authentication function cooperate to execute a job, user authentication information is transmitted from a cooperative information source processing apparatus to a destination cooperative information processing apparatus that execute the cooperative job. A user account is created at the destination cooperative information processing apparatus based on the transmitted authentication information. When the cooperative information source processing apparatus notifies execution of a cooperative job to the destination cooperative information processing apparatus, authentication information that is authenticated at the cooperative information source processing apparatus is transmitted to the destination cooperative information processing apparatus. The destination cooperative information processing apparatus creates a user account based on the authentication information, and executes the cooperative job using the created user account.