Exchange 2000/2003 Private IS/Mailbox Replication

Hey all,

I'm in a pickle and am in need of some help,

I am going to be upgrading my exchange organization
one of these is the following route :
Windows 2000 Advanced Server - Exchange 2003
Windows 2000 Advanced Server - Exchange 2000
Windows 2003 Enterprise Server - Exchange 2003
Windows 2003 Enterprise Server - Exchange 2000

but as of yet i am still unsure of which way to go.

I will be needing to have mailbox replication across a vpn to 3 servers altogether and I am wondering which configuration will be the besto for it?
also will i need 3rd party software to do it?

Any help is much appreciated!

Thanks,

Matt

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mathesonAsked:
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David WilhoitSenior Consultant, ExchangeCommented:
1. Upgrade, as in, an in-place upgrade? boooo...
2. Mailbox replication, how? Describe your meaning of "replication"

Give a clearer layout of your Active Driectory and current Exchange organization


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mathesonAuthor Commented:
Currently I have an nt 4 domain with exchanghe 5.5
i will be creating a new active directory domain and trusting it with the nt domain,

then install exchange 2000/2003 and add it into my current orginization/site.
then move the mail boxes over,

not the mailbox replication i want to have is both a failover and so that when a user is in another office other than his own one outlook will get his email from the closest server to him and not from the server throught the vpn/wan if you know what i mean?

so basicallly there will be a copy of each users mailbox on each exchange server so if one server dies it will automatically failover onto one of the other servers.

thanks,

matt
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David WilhoitSenior Consultant, ExchangeCommented:
Nope, not possible with Exchange, unless you have geo-clustered SANs. Exchange doesn't do that kind of failover. However, there is a product called Doubletake, that you can take a look at for real-time data replication to anothre server, but auto failover can only be achieved by scripting it to do so. Check it out on the web.

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mathesonAuthor Commented:
what about clustering with 2003 enterprise server?
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David WilhoitSenior Consultant, ExchangeCommented:
clustering gives you a second server to failover to, which is good fault tolerance. However, it's way expensive in hardware, can't use just anything, has to be on the HCL cluster list as an approved cluster solution. Still want it?

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mathesonAuthor Commented:
i have to find a workaround,

i was under the impression that you could replicate mailboxes across servers,

ie hold 1 user's folder on several exchange servers in the same site,

i just can't figure out how to do it?
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David WilhoitSenior Consultant, ExchangeCommented:
no, you cannot. Not without 3rd party software.

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