What is required to migrate Exchange 2003 to Exchange 2010?
Posted on 2011-04-24
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.