What is the best way to move NSF contacts into VCF for multiple clients?

[Thomaswilson081]

I am handling multiple clients who still have their contacts stored in Lotus Notes NSF files. They now want to use these contacts in other platforms like Outlook, Gmail, and mobile apps, which generally support the VCF (vCard) format. Manually exporting seems time-consuming and risky because there are thousands of contacts spread across different NSF files. I need a reliable and secure method that can handle bulk conversion without losing data like phone numbers, email addresses, and other fields. Has anyone here successfully migrated NSF contacts into VCF for multiple clients? Please suggest the best approach, whether it is a manual method or a professional tool, that ensures accuracy and saves time.