==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version: CentOS 6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):  MySQL
- Web server (Apache or Nginx): Nginx
- Manage mail accounts with iRedAdmin-Pro? Yes
- Related log if you're reporting an issue:
====

I have purchased iRedMail PRO (MySQL) and I am changing the entire infrastructure of mails to have 1 instance of iRedMail taking care of incoming mail & user/domain stuff, while it relays outgoing per-domain to a different server(s).

Meanwhile, I have to migrate some accounts, I would like to know how could I migrate from the old iRedMail to the new instance without losing the users password.

From Kolab, I believe that is not possible, simply because its LDAP based and the encryption is very likely different, so I won't go on that one.

PS: I know I could copy the database but I want a fresh and clean install on this server, that's why I don't want to manually insert the SQL users/pws and run imapsync.