You'll have to shift the accounts into the destination server if you find yourself at Phase-two of your migration process. Duplicate the file /opt/zimbra/tmp/modules/hsm/hsm-info.tgz with the resource server towards the destination server under /choose/zimbra/tmp/modules/hsm/. Enable’s think you have a Zimbra server that needs to be migrated to a different server https://www.hostscheap.com/zimbra-migration-service