DirectAccess 2012 behind two NATs

Hi Guys

I am trying to setup a DirectAccess 2012 server with single NIC on a VM as below

basically if I get a public IP NAT'd with port 443 via main firewall to a private IP (10.20.1.1 /16) and then if I get this private IP again NAT'd via another firewall with port 443 to the DirectAccess server IP (192.168.2.2/18), will this setup work as I will have to do this due to the current network topology at our business ?

thank you in advance.