Using Windows Server Backup I setup a scheduled backup on Server 2008 running Exchange 2007. It ran as scheduled until 5 days ago, when it stopped running in its entirety until this morning.
There is a gap in Windows Server Backup between these dates. The backups do not fail as they do not run at all. Although each day in WSB the backup says it is scheduled for that day.
In the Scheduled task for the backup there are no notifications between the 9th and the 14th.
When the task has started today it seems that it has attempted to run the task several times. Which resulted in a number of failures.
I have followed the step to change the task limit within the registry in this other technet post to no success.
https://social.technet.microsoft.com/Forums/sharepoint/en-US/ea368220-a058-421b-bbf0-a02c9fa86a92/scheduled-backup-not-running?forum=windowsbackup