This feature is available only for Office 365 Personal license. For Office 365 Business, please visit THIS FAQ topic for more information.
It is now possible to directly access the documents on your personal OneDrive storage.
To do so, please take the following steps:
1. Go to the Profile Picture>User Settings
2. Go to the Apps and click on the Activate button in the OneDrive line
3. Sign in with your Outlook.com account and confirm the access.