DNS for IPSec Tunnel & DHCP

I have a 60e setup at a house. It is the main firewall for everything at the house. I have 1 laptop with reserved ip addresses ( 1 for ethernet, 1 for dock and 1 for WiFi) that connects to another site over a IPSec tunnel from the Fortigate 60E to a Fortigate 300E. The problem I have is that DNS has to be manually changed on the laptop when it connects. It is being issued dhcp from the 60e, but it needs DNS from the remote 300E. 

Are there any suggestions for the laptop to automatically receive the correct dns when it connects?