Copy the file /opt/zimbra/tmp/modules/backup/backup-facts.tgz with the source server for the vacation spot server below /opt/zimbra/tmp/modules/backup/. Repeat the Cellular migration and account migration until all of the accounts are migrated to your desired destination server. After the conversion, go and Test the migrated Zimbra into the O365 on-premises file on The https://www.hostscheap.com/zimbra-migration-service