An apparatus includes a storage unit configured to store therein, in association with one another, group identification information for identifying groups to which transmission terminals each belong, transmission terminal identification information for identifying the terminals belonging to the respective groups, and display information to be displayed on the transmission terminals belonging to the groups. The apparatus also includes an acquiring unit configured to acquire the group identification information of a certain group and a change instruction for the display information; a changing unit configured to change the display information associated with the group identification information in the storage unit based on the change instruction; and a transmitting unit configured to transmit the display information associated with the certain group in the storage unit and changed to the terminal identified by the transmission terminal identification information associated with the group identification information of the certain group in the storage unit.