An image processing apparatus, if a login application (login app) is enabled, performs setting of an authentication function (authentication transmission) of a transmission application (transmission app). The image processing apparatus performs an ON or OFF setting of the authentication function (authentication transmission) which has a handover function for receiving authentication information, used for authentication by another application, that is handed over from the other application and using the handed over authentication information. The image processing apparatus, in accordance with the login app being enabled, by setting the authentication transmission of the transmission app to ON, enables handover by the handover function of authentication information used by the login app to the transmission app.