Windows scheduled backup is failing

Hi,

We have configured windows server backup scheduled backup option.

we are able to run the backup manually, but the scheduled job is failing.

After checking further, the scheduled task is failing to launch.

The following is the event:

Task Scheduler failed to start "\Microsoft\Windows\Backup\Microsoft-Windows-WindowsBackup" task for user "XXXXXXXXX".

Additional Data: Error Value: 2147943726.

please advise.

Thanks in advance

Ekachakra