There was a requirement to generate permission denied error in CIFS mount point when ever user was accessing the mount point. in out case /BRKTS
in /etc/fstab following lines gives full access
//setappprodn98/VAL /BRKTS cifs username=sell_user,domain=na,password=123hjsdT,iocharset=utf8,sec=ntlm 0 0
in /etc/fstab following lines gives permission denied access
//setappprodn98/VAL /BRKTS cifs credentials=/root/.cifsauth/intg_val_auth,uid=sell_user,gid=selluser_fileshare_val,iocharset=utf8,file_mode=0770,dir_mode=0770 0 0
