groupdocs.com metadata extractor has provided the following items from a .DOCX:

LastPrinted
LastSavedTime
dc:creator
CommentAuthor

which I cannot find anywhere on the Word UI itself. I'd expect to see the first three in Document Properties, but all I see like #1 is "Printed" (which doesn't mean the same) and a time that's different by one hour (time conversion error?) and nothing like #2 or #3. I'd expect to see #4 on the same comment in the body, but no.

Where should I look?

The fact I see Author, Company and others suggests the lack of the above is not due to me using Word 2013. Of the creating he metadata says only "NameOfApplication String Microsoft Office Word". No version.