A method for delivering an instant message in a server connected to two or more computers via a network is provided. The two or more computers include groupware clients in which a user can perform login at the same time, using the same user ID, and for which status that may be different from each other can be set. Embodiments of the method includes authenticating a user of a groupware client who attempts to perform login using a user ID, recording the user ID and status information in association with an instant messaging user ID, receiving an instant message addressed to the user ID, and determining, on the basis of the status information, which of two or more client computers the instant message is sent to.