Try Free Zimbra Converter tool that easily convert Zimbra file to PST free. With this freeware, you can extract large number of Zimbra files without showing any limitation bar. There is no risk of file corruption during the conversion process. It maintains all the Meta data properties, key elements, formatting & layout, folder structure of PST files. 

Know more info- https://www.vartikasoftware.com/fr/zimbra-to-outlook-migrator.html#