How to Export Zimbra to PST? Download Zimbra to PST Converter tool, it is multi process, you can convert all Zimbra data mails, contacts, tasks, calendars, event and etc. to PST file format. This software has no file size limitation, you can migrate any number of Zimbra files. Move a Zimbra file to PST Converter tool is maintains all the folder structure during the conversion process. It has very simple user friendly graphical interface. This software supports all the MS Outlook editions like 2016, 2013, 2010, 2007, and 2003 and below version also. It's a Windows compatible program, which easily operates on all Windows (64bit and 32bit) editions- 10, 8.1, 8, 7 and all the below editions.