Please also ensure that you are using Microsoft Office version 2013 or 2016. Earlier versions are not supported.
If the files have the extension of .doc or .docx, they should be processed by FFCore. I recommend contacting Xerox service -- this may be a SPAR.
I'm getting the following warning when submitting word documents in various versions
Incompatible Files Found
The following files are not supported for submission:
any advise please