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What is required to migrate Exchange 2003 to Exchange 2010?

Posted on 2011-04-24
Medium Priority
Last Modified: 2012-05-11
Single Exchange 2003 server with single Information Store, version 6.5.7638.1.
Because the information store is approaching the hard limit, I am planning to upgrade it to Exchange 2010 in Windows 2008. For financial and technical preparation, I list the following questions to comment.

Q#1. Is there any Exchange CAL upgrade path from Exchange 2003 to 2010? In other words, can I use/upgrade the existing Exchange 2003 CALs?

Q#2. What licenses do I need for this upgrade? (Exchange 2010, Windows 2008, Exchange 2010 CAL. Anything else?)

Q#3. What is the best way to upgrade it with minimum (or even zero) interruption to business? e.g. No need to reconfigure Outlook for users; Users can access their mailboxes during and post implementation.

Question by:richtree
LVL 25

Assisted Solution

by:Tony Giangreco
Tony Giangreco earned 600 total points
ID: 35458107
#1: I performed an upgrade from 2000 to 2007 last year only from Win 2000 / Exchange 2000 to Win 2008 / Exchange 2007. I contacted Microsoft. They said there was no Cal upgrade.

#2: Your list of expected licenses is correct except add Win 2008 user cals.

#3. We performed this process over a month time period
A. Installed a new Dell server with Win 2008
B. installed a temp 2003 server w/Exchange 2003
C. Migrated 45 mailboxes and public folder to Exhcnage 2003
D. Reconfiged all cOutlook Clients to Exhcange 2003 server
E. Waited three days to make sure Exchange and migration was stable
F. Uninstalled Exchange 2000
G. Instaled Exchange 2007 on 2008 server
H. Migrated all users and public folders from 2003 to 2008
I. Reconfiged Outlook clients to Exchange 2008 server
J. Waited thre days to make sure Exchange and Outlook was stable
K. Uninstalled Exchcange 2003
L. Waited three weeks and took a vacation.
Note: Don't forget to take backups every step of the way. We didn't hit many bumps.
LVL 17

Assisted Solution

by:Sikhumbuzo Ntsada
Sikhumbuzo Ntsada earned 200 total points
ID: 35459063
LVL 10

Assisted Solution

by:Muzafar Momin
Muzafar Momin earned 500 total points
ID: 35459827
you will required to have cals for windows 2008 and exchange 2010

for migration follow the steps in http://www.networkworld.com/community/node/47632
LVL 10

Accepted Solution

abhijitmdp earned 700 total points
ID: 35460782

Author Closing Comment

ID: 35463695
Excellent links and advices! Thank you.

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