Symantec Backup Exec 2010 has a DST (Daylight Saving Time) issue – the first run of every scheduled jobs that are with backup time window settings will miss due to ‘The job was scheduled to run, but the availability window closed before the job could start. There may not have been any destination devices available during the window, or the job may have been submitted to run when the window was closed.’ post the DST change.
http://www.symantec.com/business/support/index?page=content&id=TECH61668
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