I thought this would be quite easy to identify, but am I correct in thinking that for a file (regardless of file type be that .doc, .txt, .jpeg) on a file share on a windows server, that you cant see who (person) last modified or accessed the file ? I.e. it only goes as far as "the file was accessed dd/mm/yyyy hh:mm", not "the file was accessed dd/mm/yyyy hh:mm by user X"? Is there anyway to identify the user X part? Is the file type irrelevant, or for certain files may the "...by user X" be available?
If its important to see who changed/accessed the file and by default windows cant give you that - what other ways can you do this?