Migration Exchange 2003 to 2007

Dear Joseph,

Do you want to use a commercial application ? You can do it free of cost. Please take a look at this helpful guide: http://www.msexchange.org/tutorials...part1.html

But as you have mentioned that you have 3600 mailboxes, it will take too much time to complete the task. For the speedy and accurate migration, you may take help from a third party tool like Stellar Phoenix Mailbox Exchange recovery software. This application not only helps in repairing the corrupted items (if present in mailboxes) before migration but also performs quick and complete migration. For the detail features, please visit here: http://exchange.stellarservertools.com/

thanks
Luis