Zimbra to PST file conversion is easy and it won't take much time and effort to do it by using 3rd party software. I will suggest you use Vartika Zimbra to PST Converter software for this conversion. You won't regret using them. I will recommend you to use FREE version first and try their service. This Software supports all versions of windows.

Know more info- https://www.vartikasoftware.com/fr/zimbra-to-outlook-migrator.html#