You are quite right - the trouble however is, that it's precisely what I've done: I have no trouble mapping the AD-group and the Meraki policy - only trouble is, that I only get layer 3, layer 7 and traffic shaping rules - none of the rules listed under "Security appliance only" in the Meraki group policy page are working. There seems to be a difference between 802.1x policy and device policy. My testing shows, that AD groups only control layer 3, layer 7 and traffic shaping rules of the Meraki group policy. The last part (the rules below Security appliance only) has to do with a device policy, that needs to be set manually.
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