To Export an FBX File

Open the model to be exported.
Select File > Export > Exchange File Types > FBX (*.fbx) .
The FBX Export Settings dialog opens.
Adjust settings as required.
Click Export.
The Create FBX File dialog opens. The default filename is that of the DGN file, but with an ".fbx" extension.
Use controls in the dialog to select a folder and, optionally, change the file name.
Click Save.