Office 365 - Importing Contacts into Gmail
This document describes how to import your Office 365 contacts into a Gmail account.
Under the Google logo, click Gmail to access the drop-down menu, then click Contacts.
Click Import Contacts... on the left side, then click Browse.
Choose the .csv file that you exported from Office 365 (see Office 365 - Exporting your contacts/address book).
Your Office 365 contacts have now been added to your Gmail account.