How to WiFi at branch office route across tunnel to head office?

[Westcana]

I have a branch office that has a point to point vpn with the head office. This link has been operating flawlessly for months now. Clients on either end can communicate with clients on the other end. There is no nat between the sites. Each branch office has it's own subnet. The branch offices are using Fortigate 50E and the head office is using Fortigate 60E. The branch office Fortigates are the type that have build in WiFi, so the fortigate is aware of the subnet for the wifi and acts at the gateway/dhcp/dns for the wifi network. The branch offices have a private wifi that is on it's own unique subnet that is able to reach the wired subnet at it's own branch. However I am unable to have that private wifi reach the head office subnet. There is no nat between the private wifi and the wired network.

[rwpatterson]

Take a look at your routing tables. Make sure there are routes between sites.