I am not an Exchange Guru, so please bear with me:
I plan to move Mailboxes from EX03 to EX10.
What are some of the best ways to recover from a disaster?
1. Create an image of the source server?
2. Just backup the EX03 database?
3. Have all users enable an OST mailbox on their client computer?
4. Create PSTs?
5. Backup the System State?