Moving large email folders

I have an Exhange 2003 server and Outlook XP
Some of my mailboxes are 10GB plus
It runs on Terminal Server 2003 so cannot use cached folders
How can I move this data to a new Exchange 2010 server at another site
There are no site links and the AD domains are separate (& one is new)
Can I do anything other than export in chunks to PSTs then re import
How big a PST can I make with Outlook XP
Would it help if I installed Outlook 2010 on the new TS first before the exports to PST?
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AmitIT ArchitectCommented:
for large mailbox exporting to pst is better option. Unicode support upto 20 GB of PST size. Export for one user and import it back. If you are using exmerge, then it cannot be more than 2 GB as it is in ANSI format.

hope this helps
I think I'd use exmerge for this. Exmerge can be used to pull everything from the mailboxes and dump it into a PST.
Exmerge is gui driven and is fairly straightforward:

Then to get the pst into the 2010 box: 

Or mount the pst in an outlook client connected to the exchange server and copy manually.

As for the PST size, see here for any concerns:

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SriHarsha KTechnical Services SpecialistCommented:
Even Ontrack Power Controls  is a good tool for the job.
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