[exim] Upgrading from Exchange

Hello all,

Am moving an org from an Exchange server with Outlook 2000 clients to an Exim server and Thunderbird clients - what's the best way to transfer emails over? I seem to find Thunderbird is unable to open exported emails from Outlook 2000 - and the servers wont' be able to run at the same time - but anyway I can't add in an standard IMAP account into Outlook due to the way it's set up, and can't access an Exchange server using Thunderbird so can't use the IMAP transfer trick. Any ideas?

Thanks very much for your help in advance

Cheers - Piers

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