A first connection between a first communication apparatus and a server apparatus and a second connection between a second communication apparatus and the server apparatus are established. The first and second communication apparatuses exchange information on their features via the first and second connections, and then, disconnects the first and second connections. The first communication apparatus acquires information on settings of its communication environment, and then, establishes a third connection with the server apparatus. The second communication apparatus acquires information on settings of its communication environment, and then, establishes a fourth connection with the server apparatus. The first and second communication apparatuses exchange the information on the settings of their communication environments via the third and fourth connections. The first and second communication apparatuses establishes a fifth connection between them not through the server apparatus, based on the information on the settings of their communication environments.