Export > Include > Animation > 
Constraint
 
 
 

Activate this option to ensure that certain supported constraints are exported to FBX.

FBX supported constraints include:

This option lets you export your constraints effectively without the need to bake the animation first, if you are transferring to a package like MotionBuilder (which supports these constraints).

NoteIf you export your scene with the intention of importing it into a package that does not support these constraints (such as 3ds Max), you must bake the animation first. See Bake animation for more information.