Saving attchment to Windows server

Open email with attachment. Right-click and save attachment to directory on Windows 2008R2 server. If the file already exists there, am prompted if I want to replace file. If I drag and drop same file to same folder, GroupWise automatically creates a second copy of the file with the number 1 appended to the file name. Any way to get GroupWise to prompt me to replace the file with drag and drop?