The most secure way to convert NSF to PST is by using a tool like eSoftTools Lotus Notes to Outlook Converter software. This tool has the ability to auto-identify NSF file and extract all items of the file even if they are corrupted. The user can select the desired items like inbox items, contacts, notes, tasks, calendar, etc for recovery or conversion. An option is available to export NSF file into many different files like EML, EMLX, HTML, MSG, PST, CSV, etc. All editions of Lotus Notes and Outlook are workable with this tool.
Explore more: https://www.esofttools.com/nsf-to-pst-converter.html