Use a professional solution if you’re seeking a quick, simple, and efficient way to convert NSF files to PST ones. One of the best options on the online market is the NSF to PST Converter utility. Without changing the original NSF files, you can successfully export the Lotus Notes email to the Outlook client with this software. You can import contacts, calendars, etc., and most importantly, this software also provides free methods.
If you want to use this free method, you can visit: http://www.datarepairtools.com/blog/free-methods-to-convert-nsf-to-pst-file/