When I exported my Outlook contacts, several free tools messed up the phone and email fields. What worked best was using a professional CSV to VCF converter that lets you map every column before exporting. The WholeClear CSV to VCF Converter handled all my contacts perfectly. It keeps the original structure, preserves names, numbers and emails and exports clean vCard files that open easily in any device or email client. It is also an offline tool ,so your data stays private and secure throughout the process.