this is a hard question. You can "save as" the workbook and choose tools
general options to set it up with a passwork and or read only suggested.
But, if you are on a network and another person has access to the folder,
then they could also move or delete that file outside of Excel. If you want
people to see the data but not change, then you could save the excel file in
one place (if you can protect) and save it as something they can not change
like a PDF or know the real one you have and will replace the one viewed by
people over there?
hope this helps