If you want to change the network name (SSID) and/or password of an entire AirTies mesh network through Customer Center, you must change the setting for the master node.
This SSID setting will then be replicated to the remaining mesh nodes.
To change the SSID:
The Change Wifi button is not available for a meshed access point that is not the master. Changing the SSID on a non-master node from here would break the mesh functionality.