After updating my Surface tablet to Windows 8.1, I now also have Outlook available to me.

I know some things are not available like macros and 3rd party add-ins and such, but I also noticed that the Junk button is grayed out.

The fact that the button is there makes me believe it can be turned on somehow but I can’t find it.

How do I enable the Junk E-mail Filter in Outlook RT on my Surface tablet?