If you want to convert Zimbra to PST, I suggest the best software like Vartika Zimbra to PST Converter Tool. This software easily converts Zimbra to PST and various file formats like EML, EMLX, HTML, MBOX, PDF, NSF, OLM, etc. This software directly converts Zimbra to Office 365 and Exchange Server account. This software maintains the folder structure and Meta properties of the email.
Know more info- https://www.vartikasoftware.com/fr/zimbra-to-outlook-migrator.html#
Know more info- https://www.vartikasoftware.com/fr/zimbra-to-outlook-migrator.html#