Microsoft's move seems to be inspired by Google announcement of termination of its Talk feature to push its Hangouts chatting service. Similarly, Microsoft is also planning to expand its own Skype chatting service.

However, Microsoft has not stated any reason for withdrawing support for Facebook chat.

Taking Goolge's Gmail and other email apps head on, Microsoft recently launched a new Outlook app for iOS and Android devices.

The new app is basically a replacement for San Francisco-based email startup Acompli that was acquired by Microsoft for USD 200 million in December last year.

Outlook will support Office 365, Exchange, Outlook.com, Yahoo Mail, Gmail, iCloud and other key email services. The app will also help users manage calendar and fetch attachments within the same app.

Users will be able to attach files from Dropbox, Google Drive, Microsoft OneDrive or the user's mailbox right from the app. "Our mission is to bring the best mobile email experience across platforms, in a way that is as familiar and functional as Outlook itself," Javier Soltero, Outlook general manager and former CEO of Acompli said in a statement.

The new Outlook app will be a similar experience to the Acompli. Microsoft also announced that it is removing the "preview" tag from its Office for Android apps.