MailsDaddy Zimbra to Outlook Converter tool is the most popular solution to convert and open Zimbra TGZ files to Outlook PST format. The application supports all Windows OS and easily migrate email, contact, calendar, task, etc. from TGZ to PST format. You can also download the free demo version first and move up to 20 items from each folder.
Read more: https://www.mailsdaddy.com/zimbra-converter/