SBS 2011 Essentials client backups are not being pruned

Question

My SBS 2011 Essentials server has a 2Tb drive dedicated for client backups. It now has 0.1Gb free. The backups should be being cleaned but are not.
I have run the Windows Server Cleanup task manually (this is set to run once a week) but this has made no difference. I note that when I run the Task Scheduler I receive "Task Uploader: The task image is corrupt or has been tampered with." error. I have installed the latest MS updates for the server.

SBS 2011 Essentials has been a remarkably solid product. I am not sure what the solution is, so I hope someone can help.

TechNet forum original post link:
https://social.technet.microsoft.com/Forums/en-US/3484093e-02a0-4744-beb9-9204404dd529/sbs-2011-essentials-client-backups-are-not-being-pruned?forum=smallbusinessserver2011essentials

Answer 1

Hi,

The backup cleanup task may be failed due to less disk space.

You can confirm that if “Delete the client computer backup database” is helpful:
https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-essentials-sbs/gg637884(v=ws.11)