Zimbra to O365 migration can be a fancy method with many restrictions. Here are several from the popular constraints: This command will seek for the all-drive-knowledge.tgz file under the /opt/zimbra/tmp/modules/drive folder and begin the import. 2. Information Backup: Prioritize the safety of your respective data by doing a thorough backup. https://www.hostscheap.com/zimbra-migration-service