Welcome to the Archived, Readonly Zimbra Collaboration forums. Here’s the place where we talked about all things related to Zimbra email products. Registrations and postings are disabled here.
Be sure to visit https://www.zimbra.com/forums to start new discussions and to find the latest answers to questions being asked.
How to migate cyrus imap accounts to zimbra?. Is there a risk for using imapsync.
There are migration details here. There should be no risk if you search the forums and follow any guides you come across and do a dummy run before you make the final migration.
Acompli: A new adventure for Co-Founder KevinH.