To cancel an RSS feed and remove all content:

  1. In your list of folders, expand the RSS feeds
  2. Right click the feed you wish to delete, and click delete. 
  3. When prompted to confirm the deletion, click Yes.

his will delete all currently downloaded content and cancel the specific RSS feed.

To completely turn off RSS feeds:

  1. Click on File -> Accounts
  2. Click the RSS Feeds tab
  3. Under feed name, click the feed you want to cancel and then click Remove.

Note: Any previously downloaded content is not removed.

To disable the social news feeds:
  1. Click on File -> Options
  2. Click on Add-Ins
  3. Find the Microsoft Social Connector and uncheck the box.
  4. Restart Outlook.

This will disable any social connectors to your Outlook profile.