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Advice needed on islanded Exchange 2003 Domain Migration

Hi -

A customer of ours had an IT Admin that was a bit of a 'rogue' and now I am helping clean some things up.

They have two Windows 2000/20003 AD domains, one of which whose only purpose is for Exchange 2003.  This setup was created without a trust - users have been duplicated in both domains to make it work.  About 60-70 users in three physical sites.  

Domain1 - Users, Computers, etc
Domain2 - Exchange only

My plan is to eliminate the Domain2 AD domain and migrate the mailbox information to Domain1.  

Domain1 and Domain2 reside in different physical locations - so one caveat is I'll be doing a two-stepper with ExMerge - grabbing all the .PST information and carting it over to the other Exchange Server for an upload.  The WAN connection is very slow so my plan is to drive it over.

I've created a new Exchange 2003 Server at the other site and joined it to Domain1, and got a workstation with ExMerge configured correctly to work with Domain2.  

I would also love to get a trust going between Domain1 and Domain2 - for I'll also need to use ADMT to move over the many, many distribution lists that exist in Domain2.  

Here are my questions:

What gotchas can anyone see with this plan?
How do I import the .PST data into the new domain correctly, taking into account that user objects already exist?

Thanks in advance for your help.

Jason




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abhaigh
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trivalent

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Thanks, that is exactly what I was looking for!  

What more can you tell me about the mailmig /m?   I am not familiar with it.  
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I see - that's just the command line equivalent for the Mail Migration Tool.   Running the /M seems to be the way to go as well.  

Thanks for the help, points awarded.