I would suggest you try a tool like eSoftTools NSF to PST Converter Software. It allows the user to view all the components of the mailbox and then choosing the required items for migration into a different file format. This tool provides multiple options for contact conversion. This involves CSV, PST, MSG, and VCF. But apart from contacts, the user can export emails to other file formats. Each contact is saved with all its properties including first name, last name, profile images, email, etc. A free demo is also offered got trial. Just open this tool and select the contacts folder and proceed with the required file type.
Get More Info:- Convert NSF to PST file