This script demonstrates how to import multiple contacts from vCard files in Office 365 Exchange Online. You can choose to import a single vCard file or multiple vCard files with this script.
Currently Outlook Web App supports to import a .CSV file only. You need to find a solution to convert vCard files to a csv file when migrating from another email service providers or solutions. So you want to use a script to mitigate this problem.
You can find more All-In-One Script Framework script samples at https://aka.ms/onescriptingallery