Exchange 2007 multiple sites

I have an AD network with one domain that spans 3 sites.   I have an Exchange 2007 server in my main site called site A.   I have site B and site C that are remote offices and we have a dedicated 3 Mbps pipe connecting them to the main site A.   Right now, my users in site B and Site C are pulling their mail via pop3 from our Exchange server in site A.  

Is it possible to put an Exchange server in Site B so the users in Site B and Site C can access an Exchange server that is geographically closer to them than pulling mail across a WAN via pop3?     Is it possible to replicate the 2 mail servers (at night), like AD would do between site, so that I always have up to date data on both Exchange servers?
drichard16Asked:
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BusbarSolutions ArchitectCommented:
for the first question, yes of course and this is the recommended approach, keeping emails closer to users will allow you to utilize the WAN connection better and allow users to experience better end-user feeling and faster email response.
the case is different in E12 because in your case you will have to install HUB+Mailbox+ CAS roles in each site, and mail could come in and go out to external world through the main site.

regarding question 2 , this is called CCR and not used as you said in your case, because this is used for high availability, however going with the previouse design is the recommended design
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poweruser32Commented:
yes it it is possile to put an exchange server in site B as this is common enough practise-you can than use exmerge to transfer the pop accounts to the mail server as well on site B
you can also use seperate routing groups on each exchange server so that outbound email does not have to travel over the pipe
the only thing is that you need to have enough users in sites b and c to justify another exchange server
what do you mean by replicate?what kind of data are you talking about -the only replication i know of is the public folders
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BusbarSolutions ArchitectCommented:
@poweruser32
exchange 2007 doesn't use the concept of routing group, routing is running based on the AD sites cost

and you don't need to use exmerge as you can use the move-mailbox cmdlet
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AmitspeedstarCommented:
Busbar is right , u need to install a Hub + Mailbox+ CAS roles , as Exch 2007 has roles defined for each task that you want it to perform .
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Donnie4572Commented:
Regardless of the terminology … While, as always, MS changes the name and number of clicks to accomplish a task the concept is still the same.

Why are you using the POP download instead of using Outlook mapi client to connect directly to the main office?

With that said if you are willing to pay the additional cost for added license, hardware, admin overhead, backup devices, and DC/Global Catalog at those sites then go for it.




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drichard16Author Commented:
The main thing is if site A goes down then I need to make sure that my users mailboxes from site a are available at site B.   The theory being, we will redirect my site A users to logon to Exchange server at site B.  

We took a look at CCR in EX 2007 and putting the passive node in my remote office in site B.   We deceided against it because my users in site b and site c would still be required to come across WAN to access mailboxes on the active node.  

We really want users in all sites to be able to access mailboxes on the closest Exhange server but also be able to access their mailboxes in remote site in the event their closest Exchange server is not avaiable.

????
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BusbarSolutions ArchitectCommented:
I don't think that exchange architecture contains something like that unless you will cluster each site to other site, and i think this will be a very costy solution.
but simply using the current tools, you can not do that, but consider that accessing email over the WAN in case of site A failure will be for a small period of time and you WAN connection can handle it
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tim1731Commented:
if just email across the link why not use rpc over https (need outlook 2003 or above) http://www.petri.co.il/configure_outlook_2003_to_use_rpc_over_http.htm
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