Hi, we have the latest configuration manager and all of my site maitence tasks are enabled and set to run in 30 days or less (i.e. Delete Aged Discovery Data, etc). I have noticed a computer (maybe more than one, haven't looked beyond that one) being discovered by the Active Directory System Group Discovery method when it was deleted from Active directory in January of this year. When I pull up the properties of that computer it tells me the agent name: SMS_AD_SYSTEM_GROUP_DISCOVERY_AGENT and the agent time of 12/16/2010 12:00:01 AM. The creation date is 12/16/2010 12:00:38 AM.
My Delete Aged Disocvery Data is set to run nightly at midnight and deletes anything older than 30 days. While viewing my adsysgrp.log, I cannot find the computer name in there. Viewing my status messages for SMS_DATABASE_NOTIFIER, it shows data being delete from the different tasks. For instance Delete Aged Discovery Data - System completed successfully. The task deleted 2 items from the SMS site database.