What is CAE option on "Export Assembly" UI in NX Manager mode ?
The 4 CAE options (Simulations, FeModels and Idealized Parts. - FeModels and Idealized parts. - Idealized Parts - None) control what CAE items are automatically exported with CAD parts during export.
The user can select a CAD part or assembly for export, and if one of the CAE options is selected, NX will automatically export the related CAE parts without the user having to directly select them. Note that you can directly add CAE parts for export. These options just allow you to automatically export CAE parts related to your selected CAD parts/assemblies. The different options control which types of CAE parts get automatically exported.