@MattATron 

Theroretically it is possible.  The Archer C7 in AP mode would be getting its address infromation from where ever the DHCP server is located, whether that be the managed switch or the router.  As long as the Managed switch supports 802.11Q Vlan tagging the C7 should act like a unmanaged switch and just pass all data through.  However, some of our routers do a type of VLAN tagging to seperate the Main WiFi from the Guest WiFi.  If you have tried the C7 in WAP and its not passing the traffic this inhernet tagging may be responsible.  We will pose this question to our development team and will update as we get more infromation.

Best Regards 

@MattATron 

So we did confrim with the Software team and they confrimed that the Archer C7 in AP mode forwards traffic based on MAC address so as long as the Smart Switch has the address in the MAC Table traffic should be forwarded with no issues.