If you are searching for helpful tool to import Zimbra file to Exchange server, then you can use Zimbra to Exchange server Converter.
Features are:
• This software export Zimbra file to Exchange server and additional file format such as PST, MBOX, EML, EMLX, HTML, PDF and etc.
• This software also export Zimbra file to Gmail, G Suit, Google Drive and etc.
• This application securely export Corrupted file.
Read More: https://www.kdetools.com/zimbra/exchange/