If you want to migrate Zimbra files to Exchange server without losing information, you can try Zimbra to Exchange server Converter tool.
• Zimbra to Exchange server Converter maintain folder Structure during the migration process.
• Zimbra to Exchange server converter support various file formats such as PST, MBOX, MSG, EML, EMLX, PDF, OLM, HTML, etc.
• 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.
Read More:
https://www.kdetools.com/zimbra/exchange/