To get all Lotus Notes file to Outlook PST file with for security of NSF Mailbox. Try eSoftTools Lotus Notes to Outlook Converter Software for multiple conversion of Lotus Notes database to Outlook 2003, 2007, 2010, 2013 and 2016 with emails, attachments, contacts, schedule, notes, assignments and so on. It migrates Lotus Notes along with the mailbox components such as emails, tasks, drafts, journals, calendars, and contacts.
You can attempt the free demo of the NSF file converter tool that can help to knowhow programming functions and furthermore recuperate 25 emails of NSF files.

Get more info: Export Lotus Notes to Outlook