Cannot export as m4a in Audition

Hello!

I'm trying to export my files in Audition to m4a using the "Apple Toolbox" selection but it will not export as anything other than .caf despite choosing the correct settings during export. There's one other thread here that addresses this but now there's no answer so I thought I'd bring it back to the forefront.

Does anyone have a solution other than converting through a 3rd party?