Communication using shared communication parameters which reduces unexpected communication device connections while conducting auto configuration

A communication apparatus comprising:

• a providing unit constructed to start a process for sharing communication parameters in response to an instruction from a user, and to provide the communication parameters to a receiving apparatus when the receiving apparatus requests transmission of the communication parameters;
• a determination unit constructed to determine whether there is a plurality of communication apparatuses to which the user instructed to start the process for sharing communication parameters;
• and
• a notifying unit constructed to, in case where there is the plurality of communication apparatuses to which the user instructed to start the process for sharing communication parameters, notify the receiving apparatus to which the providing unit has already provided the communication parameters of a notification that instructs the receiving apparatus to halt usage of said provided communication parameters.