Try the
Sysessential Zimbra to Outlook Converter Tool to convert Zimbra to PST. All emails, attachments, and compressed file data from Zimbra TGZ files are converted by the software into the Outlook PST format. Its sample version, which transforms a few objects from each folder, can be downloaded first. From Zimbra Desktop/Web Client to Outlook 2019, 2016, 2013, 2010, 2007, and 2003, it allows full data transfer, including emails, contacts, calendars, attachments, contacts, notes, messages, and events. This system produces a trial version from a few files and provides a sample version for free.
