The best way is Softaken Zimbra to Outlook Converter Software, which converts Zimbra TGZ files to PST, MBOX, EML, EMLX, MSG, and other formats, such as attachments, emails, notes, contacts, calendar, briefcase, and many more. This professional tool converts Zimbra emails to PST files with all attributes, folders, structures, properties, hierarchies, filter data, etc., without any restrictions or data loss. Users can easily load any large Zimbra files to PST, MBOX, EML, and other formats to safely access Zimbra data in MS Outlook, Thunderbird, Apple Mail, Windows Live Mail, SeaMonkey, and other major email clients. Additionally, it can ensure data integrity during the conversion process. Users do not need any technical skills, and Zimbra Desktop does not require any installation. Moreover, this program works with both MS Outlook and Windows OS versions (new and old). It also offers a free trial sample version where you can learn more about the capabilities of the software.