COMMUNICATIONS SYSTEM, MANAGEMENT SERVER, AND COMMUNICATIONS METHOD

A communications system includes communications terminals connected to a management server. The management server includes a terminal manager managing data center identification information-acquiring identification information items for acquiring identification information items of data centers available to a predetermined one of the communications terminals in association with the identification information items of the data centers, a service manager managing services available to the predetermined communications terminal in association with the identification information items of the data centers, and an access authorization verification processor managing access to the services, based on the identification information items of the data centers available to the predetermined communications terminal in association with the data center identification information-acquiring identification information items, and the identification information items of the data centers in association with the services available to the predetermined communications terminal when an inquiry about the services available is received from the predetermined communications terminal.