Why is the Windows Store tab not visible in the Inspector panel?

I am new at this and created a new project. I was following the tutorials on the Microsoft site and when setting performance and quality settings noticed that the Windows Store tab is missing on the Inspector Panel. It only gives me the option for PC and Mac. Did I miss a step? How can I fix this so I can select the Microsoft Hololens?

When you install Unity, you choose the platforms to install. If you’re missing a platform, run the installer again to add that platform.

This doesn’t work. Can you supply a more robust answer?