Are you referring to SafeSearch, the Bing setting that filters out inappropriate web content.
To change it:
Open a browser and go to Bing.com.
Select the icon (Burger menu) in the upper right of the Bing.com window. Select Settings ( Gears ) , and then select More.
Choose your SafeSearch preference: Strict, Moderate, or Off. Select Save at the bottom of the menu.