Unclear upgrade path from E2K to E2K3

I'm looking to upgrade a client from E2K to E2K3. They currently have only one server which is W2K DC and E2K. We're looking to install a new server with W2K3 and E2K3 but would like to keep the existing W2K server and it's AD in place. The current server will be used for logon, data and printing and the new server will be just for Exchange. I am familiar with installing a W2K3 server into an existing W2K AD but I am not quite sure how to handle the Exchange side of things. I would ideally like to remove E2K from the current server altogether.

Any help or guidance to relevant documents would be much appreciated.
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will the new server be a DC or just a member server?

you will be installing the e2k3 on the new server and it will automatically detect the existing exchange org from AD

you need to run the forestprep and domainprep from the e2k3 setup

once that is done install e2k3 and the SP

after that create a test account on the new server and check the mail flow
once confirmed that it is working fine, move a couple of users to the new server and check their mail flow and if they have any problems on the new server

if everything is working fine with the new users then move all the users to the new server
also add PF as replicas on the new server and give it time to replicate
do the same for system folders as well
once Pf have replicated remove the name of the old server from the Pf replica list

also set the RUS server to the new server and the OAB server to the new server
set the routing master server to the new server

stop the exchange services on the old server for few days to check whether the users face any issues or not when the old server is not working

if everything goes as planned then run the exchange uninstall on the old server
if you get an error that there are mailboxes on the old server then check the "homemdbl" value on the mailbox store object of the old server via adsiedit.msc
it will show you the list of mailboxes present in the mailbox store of the old server. you can move those mailboxes to the new server from ADUC or remove their exchange attributes if the mailboxes are not required

you can also check the following

Considerations when you upgrade to Exchange Server 2003
Exchange 2000 Server and Exchange Server 2003 setup and installation top support issues
Exchange Server 2003 Secure-By-Default: Upgrading from Exchange 2000 Server
Introduction to Migration from Exchange 2000

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Sembee has it all outlined quite nicely here, including all the necessary links:


octopusdataAuthor Commented:
Many thanks Rakesh and Kris. This install is starting 8/9th April and will complete (hopefully) the following weekend. In the meantime, I'll look through your comments. Thanks once again.
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