You could use access policies with 802.1x  https://documentation.meraki.com/MS/Access_Control/MS_Switch_Access_Policies_(802.1X)#Apply_Access_Policy_to_Switch_Ports     ... View more

yes, I can only see one client on my dashboard, the vmx is not doing nat, is configured as concentrator....   ... View more

I'm thinking you'll need to pull the event log for each store, and look for up/down events. ... View more