The Maya FBX Plug-in has two export workflow presets:
The Autodesk Media and Entertainmentpreset is the default preset for the Maya FBX Plug-in Exporter. The Autodesk MotionBuilder preset is used for exporting animation files to MotionBuilder.
If you change a preset, the preset field displays User defined, to show that the preset differs from its default state. The plug-in saves the User defined state in a temporary file so that the settings are the default the next time you use the plug-in.