If you need a supplicant to validate with 802.1x you can use the SEP/SNAC client as a suplicant.
Its is in SEPM/Clients.
Tab.. Policies.
General Settings.
Tab.. Security settings.
and tick the window "Use the client as an 802.1x suplicant"
Obviously you must active the Window Enable 802.1x authentication firstly.
see you.