From my experience, I would like to refer this best NSF to PST Converter Tool which is provided by eSoftTools. The function of this software is to convert NSF file without making changes in the database. Also, data can be restored from corruptions and encryption. It can also export information into different formats such as:- PST, HTML, EMXL, vCard, vCal, EML, MBOX and other formats with support to all versions of IBM Lotus Notes NSF, Outlook PST, and MS Windows. Also, this can save all emails, notes, tasks, contacts, calendars, journal items and appointments, and users can use the free demo version to save 25 items from each file.

Read More:- Import Lotus Notes to Outlook