Exchange 2003 and 2007 Co-Existing

Hello,
I have a fully functional Microsoft Exchange 2003 SP2 Front End/Back End Clustered non production environment. People use RPC/HTTP, OWA and ActiveSync to access their mail. I’ve recently installed an Exchange 2007 Server in this organization to take this non production network to the next level of testing. Email can be sent and received from mailboxes on the 2007 server. My question is how to make OWA and ActiveSync available on both the 2003 and 2007 Exchange Servers. I currently have a rule on my SonicWALL 2040 directing port 443 to my 2003 Front End Server. Please let me know if you have any suggestions.
Thanks
Jeff
fluffyfrogAsked:
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SembeeConnect With a Mentor Commented:
That is the theory. I haven't done it myself as I just haven't had the time to spend with Exchange 2007. It is still a BETA product and the changes are significant enough that the skills in the community will take time to come up to speed.

The basic principle will stay the same, but the actual setup and configuration could change. I understand that there are significant changes between the last public BETA and the RTM version - which is partly why I am waiting before getting stuck in with Exchange 2007. Three versions of Exchange in my head, plus service pack differences is quite enough without having to learn two variants of Exchange 2007.

Simon.
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SembeeCommented:
Simple.
You need to replace the Exchange 2003 frontend with an Exchange 2007 equivalent. They are backwards compatible.
Remember the golden rule with frontends - it should always be the same or higher than the backends that it is serving.

Simon.
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fluffyfrogAuthor Commented:
Thanks for your response. I just want to make sure tha I completey understand the solution.
If I replace my existing Exchange 2003 Front End Server with an Exchange 2007 Edge Tranport Server it will serve OWA and ActiveSync for both the 2003 and 2007 Back End Servers. And, there 'may' be no more network changes to make. (it just sounds too simple)  :)

Thanks

Jeff
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