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WARNING - Technical Content. Use at your own risk. 8-)
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One way to migrate existing Outlook email to Gmail:
--Set up Gmail account
--Set up Outlook IMAP account for Gmail
--Drag & drop old mail from Exchange into Outlook’s IMAP Gmail Inbox
Seems to work with the limited testing I did today.
Note: There is a Calendar sync tool from Google that seems to work for the non-subscription (Docs.Google) Calendar. I couldn’t fully test because I have Outlook 2010 and the tool only supports up to 2007.
http://www.google.com/support/calendar/bin/answer.py?answer=89955
The one-time, Calendar import tool also works well.
Note2: There does not appear to be a “Contacts” sync tool for the non-subscription Gmail contacts. Although, a one-time, Contacts import tool does work well.
Scenario #1 (Abandon Exchange but still use Outlook)
1) Leave the Exchange/Outlook setups as is
2) Setup everyone’s Gmail account
3) Add a Google IMAP account and .PST (for Contacts, Calendar, Tasks, etc.) to everyone’s Outlook
4) Flip the MX records to Google as primary and Exchange as secondary
5) Run like that for a few days to make sure all goes well
6) Remove the secondary MX records (Exchange)
7) Revisit the desktops to move the Calendar, Contacts, and email to the .PST from the Exchange .OST
8) Remove the Exchange account
9) Everyone continues to use Outlook like nothing happened
Advantages
--Easy and low risk
--Users see little difference in functionality
--Email available off-site
Dis-Advantages
--.PST file (containing Contacts & Calendar) is vulnerable to hard drive crash
--Contacts and Calendar not available off-site
Scenario #2 (Abandon both Exchange and Outlook)
1) Leave the Exchange/Outlook setups as is
2) Set up everyone’s Gmail account
3) Add a Google IMAP account to everyone’s Outlook
4) Flip the MX records to Google as primary and Exchange as secondary
5) Run like that for a few days to make sure all goes well
6) Remove the secondary MX records (Exchange)
7) Revisit the desktops to move the Calendar, Contacts, and email to Google
8) Teach everyone how to use Gmail (w/Contacts) and Google Calendar
Advantages
--Minimal risk
--Everything available off-site
Dis-Advantage
--Users must learn how to use Google’s web interface to read email and calendar