This command will export accounts belonging to the specified area in the accounts-generate-knowledge.tgz file beneath the /choose/zimbra/tmp/modules/travel folder. This will get started importing the info and start logging the data while in the /decide/zimbra/log/import.log file. If it's not the case, you've got the option to migrate in self service manner. https://www.hostscheap.com/zimbra-migration-service