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To convert multiple Lotus Notes NSF files to PST file format, including all emails, contacts, calendars, tasks, notes, and other items as well as attachments, you can also try the vMail NSF to PST Converter software. Without using Outlook, you can bulk import NSF files into the PST file format. It worked with all current and older versions of Windows OS, Lotus Notes, and Microsoft Outlook. The software's free demo version is also available for usage without incurring any fees.

Get more info- https://www.vsoftware.org/nsf-to-pst-converter.html