I think you should go with PassFixer tool because this tool interface is very simple and user-friendly. It’s able to restore damaged and corrupted NSF files. It allows converting NSF file data to PST and many other formats such as Yahoo, Office 365, MSG, ICS, VCF, HTML, Yahoo, Gmail, HTML, CSV, Zimbra, and MBOX. with email filtering option you can easily convert only important NSF file by date range. For more information check the free demo version of this tool.