With the help of Vartika TGZ to PST Converter , you can simply export large TGZ data files in all Outlook items such as - emails, tasks, journals, drafts, sent items, notes, calendars and other items and convert them in PST format without losing data. All editions of Windows, MS Outlook and Zimbra are compatible with the application.
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.