dude.........what is procedure to import maya files into unity
what issues are you having specifically? I don't currently use Maya, but I did when I first started with Unity. I usually just made a Maya folder structure setup within my assets directory of my project. Then I would just use the *.ma and *.mb files in there to create my prefabs.
It's definitely designed to be a straight forward process you can literally push and pull verts in Maya, Save, switch to Unity, and it will process those changes automatically. Only requirement is they are in the project folder structure.