Allowing acces to one facebook page

Using the static URL filter should work. Assuming you aren't blocking Facebook at all you can set up a rule for 'facebook.com' and block it. Then create another rule for 'facebook.com/XXXXXXXX' where the X's are the full page you want to allow and move that above your block rule.

Hello,

1)Enable ssl deep inspection in the policy

2)block fortiguard category-->Social networking

3)add an url filter for that facebook url with action  "exempt"

If this doesn´t work try this:

1)Enable ssl deep inspection in the policy

2)add an url filter for that facebook url with action  "exempt"

3)add an url filter for  *.facebook.com url with action  "block"

I hope this will help you

Regards