http://www.reallusion.com/iclone/3dx/
Importing motions into iClone from various sources and vice versa will be one of the most common functions you will perform with 3DXchange 5. In this tutorial, you'll get a quick run-through of how you can import FBX motion files via 3DS Max, and apply the 3DS Max Character Studio Biped bone rig template to calibrate them for use on your characters in iClone.