For best NSF to PST Conversion, the better way is to try a Third-party tool and I would suggest Shoviv NSF to PST Converter tool. Because Shoviv provides better security and converts data with accurate results without any data loss. It also provides the 100% guarantee to convert accurate results for NSF to PST Conversion.
The provides the multiple Features:-
1:- Convert NSF data into Bulk at the same time into Outlook PST, EML, and MSG formats.
2:- Also Provide Mapping, Filter, and Split option
3:- Data preview option before the actual conversion
4:- Supports all versions of IBM Notes, Domino Server, Windows OS, and Outlook
5:- Free demo also available and it helps to convert the first 25 data items per folder.

More details, visit:- Convert NSF to PST
Use NSF to PST Migration utility the great application as this seems to be quick tool for me when. NSF to PST by exporting all your emails, calendars, journal, tasks, etc. Free Trial version which convert the first 10 items from each folder. NSF file into PST without facing any kind of problems. This tool Supports NSF versions 6.0, 6.5, 7.0, 8.0.2, 9.0, and 9.0.1. This utility Supports MS Office 2003, 2007, 2010, 2013, 2016 and 2019.

More info visit here:-