A server 100 capable of surely synchronizing MFPs 102 and 103. The server 100 writes a first time that the server 101 measures in response to storing of information changed in the MFP 102. When the time that the server 101 measures is changed, a time difference between the time before the change and the time after the change is calculated. A modified first time is acquired by applying the calculated time difference to the written first time when the time that the server 101 measures is changed after the first time has been written. When the modified first time is a time between a time when a previous inquiry was received from the MFP 103 and a time when a current inquiry from the MFP 103 is received, the information indicating the content of the changed information is transmitted to the MFP 103.