I’d like to bump this discussion involving ex/currently Zentyal users to share their experience so we can pull the together into a comprehensive guide. We can start with a generic guide: what taking into account and what being aware of.
from my point of view a general guide will be impossible because of there are to many different scenarios …
Some of my thoughts about a migration:
Migration scenario from running Zentyal server to a new Nethserver (maybe to a virtualized machine or complete new independend hardware)
which services running under zentyal, are available under Nethserver too all?
transferring users, groups, file shares, ACLs etc… we have to solve the problem with samba 4 integrated ldap (Zentyal) and openldap - how can we automate the migration of domains, users, groups, file shares and ACLs, email accounts etc. .
That means the whole infrastructure and services without data (the metadata)
automated file sync maybe from Zentyal duplicity backup, setting the right, new ACLs on Nethserver
automated syncing the e-mail accounts with imap sync