thanks.. I already looked at the backup window settings..
Do I have to think about the backup runtime as well ?
Backup might run about 1 or 2 hours,
so allowed backup time should be 4-6AM, 12-2PM, 8-10PM ?
Or is it just the start time of the job?
then it would be just allowed to run at 4-5AM, 12-1PM, 8-9PM (smallest selectable block is 60 minutes)