@Dave Hall: I started to looking around and this is what I ran in to it:
So looks like fweb will play part in this deployment for mobility (I have Avaya background and today is all about mobility)...
I will setup test run for Lync/fweb in the office since we have few boxes around and test for mobility.
For example, with Avaya, fweb has not function since everything is done one SIP level and SBC must be employed in DMZ.
Once again, and to confirm what Abilio is stating, Fweb is a WAF (web application firewall) operating predominantly at layer 7 and focuses at HTTP/HTTPS.
Let' s not waste everybody' s discussing the points and comma' s here.
Surely I can put a nail in the wall with my screwdriver, but that' s not where it' s designed for.
So buy a decent Fortigate and start protecting your environment properly.
my .2 cents