Exchange 2010 Edge Transport Server and/or Barracuda Mail Filter

Hello Experts,
I am migrating from Exchange2003 to 2010. I have a Barracuda Mail Filter already running and licensed for another two years. My questions are:

What is the real benefit of using an Edge Transport Server Role over a Baraccuda Mail filter?

What is the benefit, if any, of using both at the same time?

Is the Edge Server Role a "must", if one plans to use OWA, and/or Unified messaging?  

 
Thanks,
TCPIPNetAsked:
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Gareth GudgerConnect With a Mentor Commented:
Is the Edge Server Role a "must", if one plans to use OWA, and/or Unified messaging?  

Nope. The Edge server is not needed. I never deploy the Edge role. It is mostly for message hygiene and routing. OWA is completely run by the CAS role. You can put a reverse proxy in front of the CAS for additional security. This could be IIS with ARR (free) or a hardware or virtual load balancer such as a KEMP.

What is the benefit, if any, of using both at the same time?

You could have two layers of hygiene. It would add some complexity to your message routing. Personally I would just stick with the Barracuda Mail Filter and ditch the Edge role.

What is the real benefit of using an Edge Transport Server Role over a Baraccuda Mail filter?

There are some routing benefits where you could do external routing for other domains. But in 99% of installations that is not a requirement.
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