I have a windows scheduled task to run a backup of the Exchange database. I am unsure with these switches do.

Here is the task, Can someone let me know what each of the switches mean? I just want to make sure it overwrites the previous back up from the night before, and doesn't create multiple ones.

C:\WINNT\system32\NTBACKUP.EXE backup "@C:\Documents and Settings\Administrator.VISIBILITY\Local Settings\Application Data\Microsoft\Windows NT\NTBackup\data\Xchg2k System State & MIS Backup.bks" /n "Xchg2k System State & MIS Backup" /d "Xchg2k System State & MIS Backup" /v:yes /r:no /rs:no /hc:off /m normal /j "Xchg2k System State & MIS Backup" /l:s /f "E:\System State-MIS Backup\xchg2k_system_state_and MIS.bkf"