You guys have always come through for me in the past, hoping to gleam some more tech help if possible 
OEM drivers for my laptop is the Synaptics touchpad version 14, with version 15 being the current. Neither of these have the much sought after option to automatically disable the touchpad an external mouse is plugged in. I know older versions (around v11.2.4) did. Any ideas for gaining this key (and almost singular) function for my newer system?

OEM drivers for my laptop is the Synaptics touchpad version 14, with version 15 being the current. Neither of these have the much sought after option to automatically disable the touchpad an external mouse is plugged in. I know older versions (around v11.2.4) did. Any ideas for gaining this key (and almost singular) function for my newer system?