You cannot import vCards as contacts and only CSV or TSV files.
You can convert your vCards to CSV from Outlook by following these steps:
- Open Microsoft Outlook.
- Click the "File" tab, select "Options," and then click "Advanced" in the left pane. ...
- Choose "Export to a File" from the list of actions to perform and then click "Next." ...
- Select "Comma Separated Values (Windows)" and then click "Next."