Do you want to open NFS file in Outlook 2013-2016-2019, so here I suggest you to download eSoftTools NSF to PST converter software. This software has multiple file formats for conversion. This software has technical support all users get help 24x7 by email or live chat. This software has the ability to import all emails with dates, subjects, etc. It has a demo version that allows users to convert 25 items from each folder of NSF.