We are in process of implementing on-premise exchange enterprise server, as our userbase is lesser than 25 we are installing following 1 and 2 roles in same server which is behind the firewall
1.Client Access services -
Now please suggest should we have setup one more windows server in DMZ and install Edge Transport role here.
We have also procured barracuda email security on-site appliance.
Please suggest does the Edge Transport role to be setup in DMZ by retaining above 1 and 2 behind the firewall and in our design barracuda email security appliance exists hence Edge Transport role not required, please help in the design, thanks in advance.