Install Vartika Zimbra to PST Converter that migrate Zimbra emails, calendars, recurring calendaring event, contacts, distribution lists, briefcase, notes etc. to PST. It also supports to convert Zimbra data to 15+ output options like PST, EML, MSG, MBOX, and HTML. Office 365, Exchange Server etc... Use its batch mode function to migrate unlimited Zimbra mailboxes at once.

Know more info- https://www.vartikasoftware.com/product/zimbra-to-pst-converter.html