I want to share my experience with Vartika Zimbra to PST Converter. This is very effective and efficient on Zimbra data files. I have already used this tool on Window Live mail data and it works great. If anyone needs to import Zimbra file to PST format then use this solution. The tool supports all Zimbra and EMLX based email clients data such as Thunderbird, Apple Mail, Entourage, Window Live Mail, Outlook Express etc.
Know more info- https://www.vartikasoftware.com/fr/zimbra-to-outlook-migrator.html#