We are migrating a single site Exchange 5.5 to 2003 in co-existence, with an already established Native AD. Our original design was to have ISA installed in the DMZ, behind a firewall, secure publishing OWA and configured to a 2003 internal FE OWA server, that would also replace the old Exchange 5.5 Internet Message Connection. Since then we have had to use our ISA server internally to replace an old Proxy server. Therefore I would be interested if you guys think it is still worth configuring a FE server in this scenario. The benefits as I see them are: Future Scalability, we could move the ISA box back to the DMZ (if we purchase BlueCoat) Single Namespace, if we move ISA to DMZ and for ISA to publish from, The FE box can provide the Internet Mail Flow to our Mail Gateway, thus freeing performance for the Exchange DBs. Thanks, Nathan
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