It would be excellent if an m-files property could be used as a watermark within a Word document. At present, this isn't possible because Watermarks seem to be created as an image rather than as text. The m-files property doesn't get updated when it's set up to be a watermark.
Apparently this might be possible if a macro of some sort were used - so it may be that you could find a way of updating the watermark to reflect the document property when the file is opened from M-Files
