NSF to PST Converter software
Vartika NSF to PST Converter tool easily convert NSF file into PST format. You will also have the option to save the folder of mail items as MSG, PST or EML files. You can export all the mail items of the NSF file, including your emails, contacts, attachments, journals, calendar, etc.
Get more info- https://www.vartikasoftware.com/product/vs-nsf-to-pst-converter.html
Rude Warner commented
MailsDaddy Lotus Notes to Outlook Converter tool is the best solution to import NSF data in Outlook PST without losing a single character of NSF mailbox. It maintains the same structure and data integrity of Lotus Notes mailbox in Outlook account. NSF emails, contacts, calendars, tasks, attachments, etc. are migrated in exchange online platform efficiently along with the same HTML formatting and inline images.