If you are looking for some commercial tool to export Zimbra file to Exchange Server, then you can use Zimbra to Exchange Server Converter. It is the secure tool which can efficiently export Zimbra file to Exchange Server and additional file format such as PST, EML, EMLX, HTML, PDF and etc. The software also supports any type of corrupted Zimbra file and restores data without any problem. This software does not make any alteration during conversion.