Point to point connection between 2 sites

Good day all,

I have fortigate 80c and fortigate 101e running the latest available firmwares.I want to create something that acts like a virtual lan cable between 2 sites so that both sites will be getting their dhcp/dns services from one server at the main site.All the solutions that i saw are mostly with different ip set for each sites.Is this possible with fortigate devices and how to do it?Thank you in advance for any help...