> Is anyone running iMail in a clustered environment?
Yes--search the archives. IMail will run with StandyServer, MSCS, etc.
as a generic spplication.
> Currently, we are in the process of migrating 10,000 - 15,000 users
> from Microsoft Exchange 2000 to iMail. Are there any utilities out
> there to migrate the mail within the Microsoft Exchange Information
> Store? User who POP their mail are no problem, it is the users of
> OWA and MAPI based mail which will pose a problem.
What you need to outline is what the final configuration will look
like:
- Are you going to have a userbase cleanly split between users with a
full-fledged mail client and those using web-based e-mail alone, or
are there going to be a lot of overlapping users with both needs?
- Is the full-fledged mail client going to be Outlook?
- How much flexibility will you have in controlling mailbox quotas on
the server?
If you anticipate that the OWA users will become IMail Web
Messaging-only users, you may be in for some rude surprises, as IMail
is not equipped for intensive server-side storage; where OWA users can
poke around in multi-GB mailboxes, WM users are better off in the
1-100 MB range depending on overall server load. Server-side lookups
in the indexed MBX format are no match for the true client-server
performance of Exchange.
Anyway, on to the good news. If your clients are using Outlook, just
switching them to PSTs and POP3 will give them a fairly seamless look
and feel (that is, without the Exchange-specific features). I'm
surprised that you include MAPI clients in your apparent concerns,
unless you mean that these will become split Outlook/Web Messaging
clients who need to leave (some) messages on the server. My
recommendation would be use the "leave messages on the server for n
days" and "delete from server when deleted from client" features with
POP3, rather than going over to IMAP4. While IMAP4 most closely
approximates the kind of synchronization they got with Outlook, it's
almost certain that they will bloat the server with messages and
greatly deplete performance. IMAP4 is cool for brand newbies, not so
cool for those coming from Exchange (unless the _users_ really hated
it).
As far as the actual export of messages from the Exchange IS, use
ExMerge to dump to PST. That might be all you need depending on what
you see above. If not, you can convert from PST to IMail MBX to
dragging-and-dropping from Personal Folders to IMail IMAP4 folder
(each IMAP4 folder corresponds to a Web Messaging folder, FYI).
--Sandy
------------------------------------
Sanford Whiteman, Chief Technologist
Broadleaf Systems, a division of
Cypress Integrated Systems, Inc.
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