To convert your NSF mailbox data to Outlook PST format. I suggest the NSF to PST Converter (DataRepairTools). It's capable of migrating all of your NSF mailbox data, like emails, contacts, email messages, tasks, appointments, attachments, notes, images, etc., to Outlook. It has multiple features to make the conversion easy and effective and also skip the conversion of unnecessary content. The user interface is very intuitive; any non-professional user can use it with ease. The software works well on all versions of Microsoft Outlook and Windows platforms.

For more info, you can visit: https://www.datarepairtools.com/nsf-to-pst-converter.html