We have a NetApp Filer (FAS-2240A) and implemented a CIFS shares. My Data ONTAP Version is 8.1.1.
Users are complaining that if they tries to open excel-2007 files from CIFS, it shows a warring message saying that the file is already open by "UNKNOWN-USER". I tried to search on web but couldn't get fix for that. It only happens with (.XLSX) files.