Photoshop :: Could Not Save (file Name) Because Write Access Was Not Granted

Error of "Could not save (file name) because write access was not granted. The users are pulling the files from a Mountain Lion server. They all have readwrite access. If they try to save the file in the same directory they get that error but they can save it anywhere else on the sharepoint. If they save it in another directory then reopen it make a change and do a save as they can save it back to the original directory.