Is there a simple way in the controller GUI to toggle a particular network on and off? I have a guest WLAN set up as a VLAN and I don't need it to be available all the time.

Two possible options for you:

• Create a new WLAN Group based on the existing one but removes the guest SSID.

Go to Wireless Networks, create a new WLAN Group by checking Copy All SSIDs from the WLAN Group, then delete the guest SSID from the new WLAN Group. When you don't want the guest SSID to work, apply the created WLAN Group to the EAPs separately or in batch ( Go to Devices to select the EAPs, change the WLAN Group under Config > WLANs in the Properties window).

• Enable WLAN Schedule on the guest SSID to turn on or off the radio in the desired time period.

Go to Settings > Profiles >Time Range to create a Time Range which you want the guest SSID to turn off first.

Go to Wireless Networks, edit the guest SSID and configure WLAN Schedule based on your actual demands.