Just an update, the webdav only works when you open the folder in windows explorer, open the file edit and save. The Last Modified Details are then updated.
However when I try the Open in Excel option, it doesn't work.
Also double clicking file name opens file in IE allows me to edit, asks if I want to save changes, I select yes but window does not close unless I say 'Discard Changes', and even then there is no change to the doc as you would have thought it saved them the first time.
So actually the webdav is sort of half working for me at the moment.
Any ideas?!
Simon