COMMUNICATION SYSTEM AND INFORMATION NOTIFICATION METHOD

PROBLEM TO BE SOLVED: To make it possible for a user to simply obtain information of another user even if the users have difficulty in communication with each other.SOLUTION: A communication system includes: a file server which stores action history information of at least a first user: and an exchange which notifies the file server of the address and originating source indicated in a call request if the call request from the user device of a second user destined to the first user has been rejected due to restriction. The file server extracts the action history information of the first user which is the destination notified by the exchange and transmits the action history information to the user device of the second user, the originating source.