To disable an SSID in the web GUI follow the instructions to log into the web GUI and navigate to the SSID configuration tool.
You may want to disable an SSID to make room for another one. The Nokia WiFi beacons support 8 SSIDs and the default configuration uses two of them to form a mesh network. It is also possible to enable a guest SSID or additional SSIDs through the Web GUI.
The SSID can be selected and enable can be toggled on/off as seen in the configuration screen below.