VMM maintains job history for the past 90 days.

If you want to remove them manually, we need take the following steps to update directly in SQL DB. These steps are valid when you are using SQL Express for VMM DB.

1. Download SQL Management Studio Express from the following link and install in SCVMM
http://www.microsoft.com/downloads/details.aspx?FamilyId=C243A5AE-4BD1-4E3D-94B8-5A0F62BF7796&displaylang=en
2. Open the management studio console and connect to <SCVMM server>\microsoft$vmm$
3. Select Databases > VirtualManagerDB

SQL Management Console

4. Click new query within the console and input the following command.
UPDATE tbl_TR_TaskTrail SET IsVisible = 0 WHERE TaskState = ‘Failed’

5. Click Execute, it will hide all the failed status job.

Delete Failed Jobs

6. Now re-open the SCVMM console and the failed jobs should be invisible.