Zentyal Team is glad to inform all Zentyal 2.2 users that a migration guide to ease the migration from Zentyal 2.2 to Zentyal 3.0 has now been published! The guide sums up information regarding how to prepare and carry out the migration, provides access to helpful scripts, list of current limitations and known issues.
It is important to note that due to the mayor changes introduced in Zentyal 3.0 (new distribution base, Kerberos, big changes in some modules like HTTP Proxy, etc.), migrating everything is not possible. However, the migration guide provides some helpers to ease the migration process and helps to avoid manual configuration from the scratch.
If you are missing some specific information, please do request it through the Forum and we will do our best to include it. When additional migration information is available, it will be documented on the above mentioned Migration Guide page.
Enjoy your new Zentyal 3.0!