I would like to suggest you can also try
ZOOK NSF to PST Converter. The tool efficiently converts IBM Notes contacts, calendars, email messages, journals, tasks, to-do list, notes, and much more into Outlook PST format. It is entirely compatible with all IBM Lotus Notes versions, including 9.0.1, 9.0, 8.5, 8.0, 7.0, 6.5, 6.0, and others.
Explore More:-
https://www.zooksoftware.com/nsf-to-pst/