VPN SSL not browsing Internet

Fortigate 60 C

v5.2.10,build742

Hello.

My VPN users are able to connect to the SSL VPN.

The local address subnet are resolved and users can access to shared folders but

they cannot browse Internet (Computers in the local subnet can)

Split tunneling is disable on all portals.

What's wrong ? : policy, route, .... ?

Any ideas are welcome.

Thank you.