I need to migrate from zimbra 7.1.3 to 8.0.1 (both are FOSS edition) and change OS from 5.7 to 6.3 , and need to change the default domain once migration is over.

I installed 8.0.1 in the new machine and used the import wizard and it could only import the accounts. How can I have at the minimum Distribution lists, aliases and forwards migrated along with the accounts and domains?

Every documentation I read is telling me different stories, and are old. So with 7.1.3 to 8.0.1 I am expecting migration should be really easy, with some tools rather than using rsync on same zcs version and later upgrading.

Any pointers would be helpful. Thanks