Permitting internet access to servers behind the Fortiweb

Hi,

I am trying to give internet access to my servers located behind my Fortiweb which is inline (is the default gateway of other devices). The reason is that I want my servers reach internet with the same IP address which they get incoming connections from the web. For example I have an HTTP and HTTPS VIP for server A which is x.x.x.x mapping to server A real IP which is a.a.a.a. It serves perfectly incoming requests in reverse proxy mode. But for some reasons I want server A to reach internet and access dns and ftp with x.x.x.x public IP address. Is there a way to do that?

BTW the os is 5.8

Thanks