@Tina  Hi ,  If you are trying to add clients to a group policy you have created in the same way I am trying to do (see my post above), then no, there's no solution other than to use API scripts.   However, if you just want to whitelist clients across multiple networks (no splash screen, no bandwidth limitations etc) then you can use the configuration sync between networks...eg add the whitelisted client's mac address to be whitelisted in one network, and then sysnc all or selected taget networks from your source network, as below   ... View more