Caching of Installer files for AIP Installation of Acrobat DC using transforms

I have created an AIP on the network, and have 2 different transforms to apply to the same AIP for Acrobat Pro DC.

I have used the Acrobat Customization Wizard to create a transform, and want to cache the installer files for future updates.
The install works fine, but the only files that end up in the C:\Program Files (x86)\Adobe\Acrobat 2015\Setup Files\ directory

are a subdirectory with the GUID, an empty Transforms directory, and an 'Enterprise.mnt', but nothing else.

The AIP is an extracted and patched AIP.  The MST does include the setting 'Checkbox - ENABLE_CACHE_FILES - YES'

msiexec /i acropro.msi TRANSFORMS=AutoUpdate.mst /qr

Any help is appreciated!