Here is Software that will help you easily Migrate Zimbra to Outlook PSTfile. It provides complete data migration including emails, contacts, calendars, notes, tasks, briefcase and other items from Zimbra Desktop/ Webmail to Outlook 2019, 2016, 2013, 2010, 2007 and 2003. Additionally, you can even migrate your Zimbra emails to PDF, MBOX, EML, MSG, Office 365, Exchange Server, Gmail, G Suite etc., with accurate details. Using its free demo edition, you can even learn how to convert Zimbra TGZ to PST free with first 30 items per Zimbra folder to PST.
Select the file tab and choose Open & Export.
Select the Import/Export tab. Import and Export Wizard will appear.
Then select the Outlook data file option.
Select the Zimbra backup files folder.
Click the Browse button to save the file.
Check the PST file where you saved it.