This article explains how to import your contacts in Office 365. The ability to export contacts is not available in the Office 365 People application.
Import your Contacts
Click the [People tile].
Click the [gear icon] in the upper-right corner to open the settings menu.
Under My app settings, click [People].
Click [Import Contacts].
Under Where would you like to import from?, click [Outlook 2010, 2013, or 2016].
Click [Browse] and locate the CSV file with your contacts.
You have successfully imported your contacts into Office 365.
How to Get Help
For technical assistance, you may contact the Technology Support Center at 309-438-4357, or by email at SupportCenter@illinoisstate.edu.