MailsDaddy Zimbra Converter tool provides data in .tgz file format that easily moves single or multiple TGZ mailboxes to Outlook PST format. The application is compatible with all Windows and Outlook versions of 32 and 64 bits. It has multiple export options like Office 365, EML, MSG, HTML, MHTML, etc.
For more detail: https://www.mailsdaddy.com/zimbra-converter/