This property indicates the maximum number of hours that a failed backup job can remain in an incomplete state. After that time, the Activity Monitor shows the job as Done. The minimum setting is 1 hour. The maximum setting is 72 hours. The default is 3 hours.
When an active job has an error, the job goes into an Incomplete state. In the Incomplete state, the administrator can correct the condition that caused the error. If an Incomplete job does not complete successfully and is moved to the Done state, the job retains the error status.