Thanks Karstenl, but the client has already bought the MX with 5 year Adv Sec license 🙂
In fact, the client has been moving to Meraki Full stack, last year they replaced old Switch and AP to Meraki MS, and MR. and this last piece to replace is the MX.
So, I just want to confirm that MX is incapable of doing this 'S2S VPN another WAN IP NAT'?
by the way, is there a specific term we call this kind of NAT?
Thanks again,