Zimbra mailbox provides data in .TGZ file format which the user cannot open in any other email client like MS Outlook. So, professional solutions are best when a user wants to export data from TGZ to PST, Office 365, MBOX, etc.
MailsDaddy Zimbra Converter is specially designed to
export TGZ files to Outlook PST format. This application is built on a user-friendly interface that allows small, medium, and large organizations to transfer items from Zimbra to Outlook, Office 365, EML, etc. without any technical hassle. The user can migrate up to 20 items from each folder using the free demo first. It is a Windows-based program and compatible with all Zimbra versions.