Exchange Edge Transport?

I am running Exchange 2007 in my environment.  I have a mailbox server and an edge transport server which also runs my OWA.  I also have a Sophos E1100 Email Security appliance.

Since ALL inbound and outbound email is routed through the ES100 do I actually need to run the Edge Transport role on my OWA server?
lrmcenterAsked:
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pclinuxguruConnect With a Mentor Commented:
If the primary reason for having it was anti-virus and anti-spam then no.

If it's also acting as a smarthost and/or relay as well as your only OWA then yes you would want to keep it.

We ran into the same situation. We ended up ditching the transport server all together and have one exchange server with puremessage as our anti-spam/anti-viurs.

Here is a nice article about transport servers:
http://technet.microsoft.com/en-us/library/aa996562%28EXCHG.80%29.aspx
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lrmcenterAuthor Commented:
The Sophos appliance does all of our Antispam, Antivirus, Antimalware.  All incoming mail goes to the appliance and the appliance acts as a smarthost for all outgoing mail.

I am getting ready to upgrade to Exchange 2010 and wondering then if I can house all of my roles (including OWA and ActiveSync) on one 2010 server?

In this scenario would I need the Edge Server role also?
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pclinuxguruCommented:
No you wouldn't need one... in fact it is recommended that Edge server perform no other roles and all the other stuff you can host it all on one.

Here is an Excel spreadsheet to help determine what you need and stuff. Helped us out in trying to figure out what was needed for ours.

http://gallery.technet.microsoft.com/Exchange-2010-Mailbox-Server-Role-
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lrmcenterAuthor Commented:
If I decide to host all roles on one server and eliminate the Edge Transport would the best upgrade method from 2007 Dual Server to 2010 Single Server be to install a 2010 server with all roles in my domain/organization and then move the mail boxes over?
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pclinuxguruCommented:
Thats pretty much yes however there is a trick to migrating from 2007 to 2010.

I would suggest giving this a read. It is a migration guide
http://technet.microsoft.com/en-us/library/bb124350.aspx

Your basically installing exchange 2010 to coexist and then remove the old servers.
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lrmcenterAuthor Commented:
Thanks for the info...
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