Connection problem Exchange CAS with iApp configuration

Ok .... The Exchange expert in my team tell me finaly no need SSL Offload because is the Exchange Server which decrypt the client flow, the Big-IP is just passthrough .....

So, I needn't SSL client profile, right ?

But my problem is to use one VS with several services (OWA,OA, ActiveSync etc.); in this case I use an irule which redirect on good pool after reading the HTTP header: so I'm obligated to use a HTTP profil with irule and since my VIP is HTTPS it's possible to use an http profile with https without ssl profile ??

Thanks.