zero out bone rotations before exporting fbx

Is there a way in 3d studio max to zero out the rotations of bones so they show up in unity as 0,0,0 in the start pose? I’m trying to export them as fbx.

I can’t find an answer and am not sure what they even call it.

If you know how to do it in another program such as xsi, maya that would be helpful also.

Thanks,

to zero out the rotations in 3dsmax select the bone or object hold alt and right click on bone or object, then select freeze rotation