The most capable tool for converting Zimbra to Outlook is KDETools Zimbra Outlook Migration Tool, which allows you to convert Zimbra data into many different file formats, such as PST, MBOX, PDF, EML, EMLX, HTML, etc. Batch conversion is supported by this tool. There are basically no limitations to the version of Windows on which you can run this tool, whether it is Windows 7, 8, 8.1, XP, or 10.
