Migration from Visnetic Mail Server to Exchange 2003

We need to be able to migrate all of our users email from Visnetic Mail Server by Deerfield over to Exchange 2003. Currently there are 400+ users in the mail server. 95% of the users are using IMAP and the VMS webmail client.

The vendor has a tool from goes from Exchange to VMS, but not the other way around, big surprise there.

Anyone have a solution as to how we can do this?
dizzaAsked:
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ProbityCommented:
http://technet.microsoft.com/en-us/library/aa998102(EXCHG.65).aspx

Will probably be your best bet, lucky for you that you have an Exchange 2003 system, 2007 does not have a migration tool as of yet.
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dizzaAuthor Commented:
I looked at that document, but I am unable to find the ADSI "objectclass" info for Visnetic. The Visnetic Mail server saves all email in a file structure rather than any sort of database or file format that I can import into Exchange.

So far it looks like I will have to gather each users password from them one by one and setup an Outlook profile, get all the mail, save to .PST and then import each user individually into Exchange. What a pain!
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dizzaAuthor Commented:
We ended up having to take a few workstations, use Outlook to create a profile for each user, load their mail via IMAP, subscribe to all IMAP folders, export everything out to a .PST... we tried to use ExMerge at that point, but apparently .PST's created from Outlook 2003/2007 are in Unicode by default and ExMerge can't use that.... so I had to buy a software tool that will covert the Unicode PST's to an ANSI format and then ExMerge them into Exchange.

(Side note: The software tool works... but it only lets you do one file at a time, there isn't a batch function... AND, it won't save the converted .PST file as the same name, it makes it some random name of which you then need to rename back to the original user name if you are ExMerging them.)
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