An information processing system includes an electronic device; a service providing system including information processing devices connected to the image forming device via a network; a single sign on unit configured to send a request from the electronic device to the service providing system, to acquire authentication information of an external service that performs a process in cooperation with an application operating in the image forming device; an access control unit configured to receive the request from the single sign on unit whose validity has been confirmed, based on a result obtained by using identification information of the single sign on unit, in the service providing system; and a data management unit configured to acquire the authentication information of the external service from a storage unit based on the request from the single sign on unit that is valid, and to provide the authentication information of the external service to the single sign on unit via the access control unit.