==== Required information ====
- iRedMail version: 0.9.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): mysql
- Web server (Apache or Nginx):nginx
- Linux/BSD distribution name and version: debian 7
- Related log if you're reporting an issue:
====
Is working and configured mail server iredmail + roundcube
I want to upgrade to the pro version. Tell me, I have to do it over? lost already created users? letters?
Or the update will take place without consequences?