Using rsync emigrate from an old ZCS mailstore to a new ZCS mailstore is usually expected for multiple good reasons: If you have any errors, you can re-export, and re-import the problematic accounts by manipulating /migration/zimbra/accounts/users.txt accordingly and re-running the export command. If you have any “broken pipe” kind mistakes https://rafaelizuxr.wikitidings.com/5681823/the_fact_about_free_webmail_zimbra_migration_that_no_one_is_suggesting