An information processing system includes a reception part and a process control part. The reception part receives a processing request including process identification information identifying a process and user identification information from an apparatus. The process control part, when the received user identification information is stored in correlation with the received process identification information, executes the process according to the process identification information based on the result of applying change information stored in correlation with the received user identification information to setting information stored in correlation with apparatus identification information identifying the apparatus and with the received process identification information.