You've put in Zimbra Daffodil (v10) mailbox server and it does not have any accounts/configs produced on it. This command will look for the accounts-travel-facts.tgz file less than /choose/zimbra/tmp/modules/generate folder and begin the import for your people of the specified area. You don't need to migrate all mailboxes simultaneously. You https://www.hostscheap.com/zimbra-migration-service