A communication management system that receives, from a certain communication terminal, an addition request requesting to add a destination candidate and transmits, to another communication terminal, an approval request asking whether to approve the addition request, the communication management system comprising: a group management unit that manages group identification information for identifying a group to which an addition request source terminal that is an addition request source requesting to add the destination candidate belongs, in association with group identification information for identifying a group to which an addition request target terminal that is an addition request target being able to become the destination candidate belongs; a receiving unit that receives an addition request transmitted by a first communication terminal, the addition request requesting to add a second communication terminal as a destination candidate for the first communication terminal; and a transmission controlling unit that does not transmit the approval request to the second communication terminal based on reception of the addition request by the receiving unit, when first group identification information for identifying a group to which the first communication terminal belongs is group identification information for an addition request source terminal in the group management unit, and second group identification information for identifying a group to which the second communication terminal belongs is not included in at least one corresponding piece of group identification information for an addition request target terminal in the group management unit, characterized in that a group use terminal management unit that manages group identification information for identifying a certain group in association with terminal identification information for identifying a communication terminal belonging to the certain group, wherein the group indicates a unit of service received when a communication platform is used, wherein the receiving unit receives the first terminal identification information for identifying the first communication terminal and the second terminal identification information for identifying the second communication terminal, and the transmission controlling unit does not transmit the approval request to the second communication terminal when the first group identification information corresponding, in the group use terminal management unit, to the first terminal identification information received by the receiving unit is group identification information for an addition request source terminal in the group management unit, and the second group identification information corresponding, in the group use terminal management unit, to the second terminal identification information received by the receiving unit is not included in at least one corresponding piece of group identification information for an addition request target terminal in the group management unit. a group management unit that manages group identification information for identifying a group to which an addition request source terminal that is an addition request source requesting to add the destination candidate belongs, in association with group identification information for identifying a group to which an addition request target terminal that is an addition request target being able to become the destination candidate belongs; a receiving unit that receives an addition request transmitted by a first communication terminal, the addition request requesting to add a second communication terminal as a destination candidate for the first communication terminal; and a transmission controlling unit that does not transmit the approval request to the second communication terminal based on reception of the addition request by the receiving unit, when first group identification information for identifying a group to which the first communication terminal belongs is group identification information for an addition request source terminal in the group management unit, and second group identification information for identifying a group to which the second communication terminal belongs is not included in at least one corresponding piece of group identification information for an addition request target terminal in the group management unit,