Applications like Apple mail export contacts in VCF format. Outlook doesn’t understand VCF. So a conversion from VCF to CSV is required. Trying to upload the VCF file to Google will work but many incomplete or badly formatted contacts will be removed. This doesn’t bode well for data integrity.
The best way to convert a VCF with thousands of contacts is to download the free ThunderBird Client. It requires you to connect to an email system like outlook.com which you can create new. After that, you can import contacts into a new Address Book. The best part here is that Thunderbird imports ALL the contacts, regardless of whether they’re duplicates, or if they don’t have first and last names. Finally, you can export the address book to CSV format which can be imported easily and without errors to Outlook.
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