The most capable tool for converting Zimbra to Exchange Server is KDETools Zimbra Exchange Server Migration Tool, which allows you to migrate Zimbra data into many different file formats, such as PST, MBOX, PDF, EML, EMLX, HTML, etc. Batch conversion is supported by this commercial software. There are no limitations to the version of Windows on which you can run this software, whether it is Windows 7, 8, 8.1, XP, or 10.
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https://www.kdetools.com/zimbra/