Hello @Kanjiro ,   If you no longer have access to the device(s), you have two options:   Move the old devices to a new network, ensure they're checking in - then after 24hrs delete the new network. This should prevent the old devices from re-enrolling into the correct network as they will have updated their configuration with the new network ID This does usually work, but sometimes if the device(s) aren't checking in regularly they may not update the network ID, if so, try the option below Alternatively, move all existing SM devices to a new network (excluding the old ones you wish to remove) You'll need to recreate your apps & configurations, so this may be a little destructive if you have a lot of them   Cheers, Connor ... View more