I am supporting a client whom is upgrading their existing email server with more than 300 mailboxes using Exim + Horde + Apache + MySQL + Kerberos to Zimbra Network Edition.
1) Are there any Zimbra or external tools, utilities or scripts to automate the migration of user accounts and mailboxes to Zimbra NE?
2) Does anyone have any pre-deployment checklist so that I can do a trial migration to ensure success of the migration?
Thank you for your replies. I promise to write a HOWTO Guide and share it with everyone if I can get support on the above-mentioned questions.