This is now filed as a bug and we are working on it.Sue Richardson shared this idea ·
We enable you to import data using csv files. You can find more information here: https://support.office.com/en-us/article/Import-data-to-Outlook-Customer-Manager-0721a212-4ec7-4c20-b0c8-2c2b63380dcd
Currently the Business Contact Manager import (a previous Microsoft product) is not yet enabled. This will come soon.