You can easily export Zimbra to PST then you can try any professional software like KDETools Zimbra to PST Converter. Zimbra to PST Converter tool can export Zimbra files to Gmail and G Suite, Google Drive accounts and also export in online server like Office 365, Exchange Server. This software export Zimbra to multiple file formats such as PST, OLM, MBOX, MSG, EML, EMLX, PDF, HTML, etc. Before scanning is complete, this application shows a preview of the item.
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https://www.kdetools.com/zimbra/
