I would like to suggest you can also try ZOOK Exchange Server Backup Software to take backup of emails from MS Exchange server and save them into 30+ different saving options. Allows to Import Exchange Server to Thunderbird, Zimbra, Windows Live Mail, Lotus Notes, Apple Mail, IMAP account. Facilitates User to Backup Exchange Server Emails to PST, MBOX, EML, MSG, PDF, XPS, HTML, EMLX, DOC, MHT, RTF, CSV, ZIP, etc. It enables unlimited bulk storage of Exchange server email backups. It works with both the most recent and older versions of Microsoft Exchange Server.
You can download the Free DEMO version of the utility from – https://www.zooksoftware.com/exchange-server/backup/

You can download the Free DEMO version of the utility from – https://www.zooksoftware.com/exchange-server/backup/