Operating system and graphics card
Short description of error
When exporting FBX from blender, custom properties do not appear in unity. these do appear properly when exporting from maya on my computer, and do appear when reimporting the fbx into a new blender scene.
Exact steps for others to reproduce the error
create new blender scene, add an object, give it a custom property, name the property and object, keyframe the object as well as the property, export to FBX, click on custom property checkbox in blender, import FBX to Unity, enable custom animated paramter checkbox in unity, bring FBX into unity scene, add animator controller, add motion, open animation window, observe that the custom property does not appear as it would with an FBX from maya