Exchange 2003 Multiple Sites

I have a single exchange 2003 enterprise server.  We are expanding to four locations.  I would like to:
First, upgrade this exchange to a better server.
Second, install exchange servers at each location.

I would like to have the one main exchange 2003 enterprise with my antivirus, anti-spam, and blackberry in that location.  Then have in each of the other sites their own exchange server.  So the email would always be routed through the main site and through the filters.

The sites are connected by VPN tunnels so they are all the same forest and domain just separate sites with their own subnet.

Any ideas on where to begin?

Thanks,
Jason
LVL 1
jasonsloganAsked:
Who is Participating?
 
gupnitCommented:
Hi,
Lets go step by step here....
This should be the sequence, let me know if you have concerns
Thanks
Nitin Gupta (gupnit)
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jasonsloganAuthor Commented:
So will all email go to all servers from the master server?  Or can I designate through AD which users mailboxes are at which location?
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gupnitCommented:
Hi,
Once you install other Exchange Servers, then you can either create new mailboxes on those servers, or if you have exisitng users then you can move those mailboxes to those new servers.
Any mail from Internet will flow from Master to Sites and external from site will be routed via Master, the Routing Group Connectors will take care of this. Internal mail from one site to another will also flow via the Master site
Hope this helps :-), feel free to ask any questions
Thanks
Nitin Gupta (gupnit)
 
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jasonsloganAuthor Commented:
Just to be very clear...

ALL incoming email will flow through the master server then to the server in a site that contains that user's mailbox?
ALL outgoing email will flow from the user's mailbox in their site to the master server then out to the internet?
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gupnitCommented:
Hi,
Yes, provided the Site Exchange Servers, do not have direct internet connection and SMTP connectors are not created for direct delivery or via Smart host
Thanks
Nitin Gupta (gupnit)
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jasonsloganAuthor Commented:
I don't use smart host.  But what do you mean by direct connection?  My sites are in separate subnets and are connected through vpn tunnels.
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gupnitCommented:
Hi,
So you mean that Exchange servers in sites do not have direct internet connection.
From what you have said (VPN Tunnels), I can safely say that mails will only flow via Master site only. NOthinig to worry
Thanks
Nitin Gupta (gupnit)
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