I am wondering why we get alerts on integrity due on msdb and model db, when dbi_dbccLastKnownGood date field is greater than the 7 days we specify? For example, we have the job start at 2 am, and the model and msdb dbi_dbccLastKnownGood is 02:01:55.707, but we got alert. However, the master db dbi_dbccLastKnownGood field is 05:00:11.323 (all three databases run integrity check at the same job), but the job finish in less than an hour about 3 am. So why master's dbi_dbccLastKnownGood is 05:00:11.323? How does this field get updated?