help needed for Exchange 2000 to 2003 migration across 3 servers

Need some help to plan/do the Exchange 2000 to 2003 upgrade.
We have 3 sites - each site has its own Exchange server.

Main Site : PS04 (Main Server for incoming Email etc)
Remote Site1 : PS21
Remote Site2 : PS30

I have planned to get 3 x New Servers with Exchange/Windows 2003 Server. I have looked at the MSexchange.org 200 to 2003 migration but that is for 1 server but I am happy with those processes.

Which order do I migrate the servers?

Also have Mcafee Groupshield/Spamkiller on the server - will this have to be removed or just installed on the new server once it is moved across?
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sarmarioAsked:
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SembeeCommented:
You have to prep the forest and the domain. Once you have done that, the actual order probably doesn't matter. I would probably do the server that generates the OAB and is generally the lead server - so the main site first. Then migrate the others as time allows. There is no problem with running a mixed site.

My version of the migration guide is here: http://www.amset.info/exchange/migration.asp

Simon.
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Windows Server 2003

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