Reflection probes not rendering all objects in scene

In this screenshot, you can see in the scene that there are many items that aren't being rendered in the baked reflection probe, including the floor, ceiling (resulting in blue, which is the solid clear color).

I have checked all the settings of all the objects in question, and I can't see anything different about the things being rendered compared to the things not being rendered.

Any ideas???

[edit] I have no idea why the screenshot url thing isn't working...

https://screencast.com/t/kLFqqguEou27

 

Ok, I figured it out thanks to a youtube tutorial somebody made.
First, the documentation says this...
"The reflection from a baked probe can only show objects marked as Reflection Probe Static in the inspector."
However, it horribly doesn't say where to find that option. For some strange reason it's hidden in a weird dropdown instead of in the normal inspector properties (next to where it says "Static" in the top right corner of the inspector).