What is the use of “show reachable sites” check-box in “connection manager” tab?
This option is useful when files are stored in different sites and need to be migrated. It discovers all the sites that are reachable at that time, i.e., only sites which are servers that are online at that time will be shown. It excluded sites that cannot be reached at that time. Sites which are stored in servers that are offline or down will not be shown.