Microsoft recently announced that Graph API that helps you to connect the Facebook account with People app of windows phone, OneDrive and other applications, will be shutdown, there is o specific reason yet. Here is what microsoft has to say:
" Facebook's Graph API is the tool that we use to connect
your Microsoft account to Facebook. It brings contact information from
your Facebook friends into Outlook.com
and the Windows People app, keeps those contacts up-to-date, and
provides options in apps and services like Photo Gallery, Movie Maker,
and OneDrive.com to share to
Facebook. We collectively refer to these features as Facebook Connect.
Due to these changes, Facebook Connect features will no longer be
supported."
The support page goes into more de " .
Below are the Platforms for which the app will no longer be available
- Outlook Contacts
- Windows, Windows Phone, Office 365
- Windows 8.1, 8 People app
- OneDrive Online feature
- Windows Live Essentials
- Outlook connector to social sites
- Windows 8 photo gallery and movie maker