In looking through the options available for managing the client VPN sessions, there does not appear to be an option to terminate an individual session, or any/all sessions for that matter. I am moving away from using the Meraki Cloud Authentication to using Active Directory Authentication. When I make that change, all active sessions remain active until the client disconnects. So, without any timeout available for those sessions, or any way to kill an individual session, those clients could remain up indefinitely. My only options are to apply a security policy denying all access from a client VPN session that I no longer want active, or for me to reboot the MX appliance. That is a rather draconian step I would rather not take. I also tried to disable client VPN on the MX, thereby killing all active sessions. However, when I tried that, all sessions that were active remained up and operational even though client VPN was disabled on the MX.