I wanted to throw our scenario out there to see if anybody has experienced the same thing.
We have several computers that are logging event IDs 1502, 4004, and 4005 in the Event Logs. It is about once a minute. I'm willing to bet you money that it is a MANUAL REFRESH. But, from where?
Here are the facts:
- We do not specify a GP refresh interval at the Domain Level. We are in favor of the Microsoft Defaults. (90 minutes, with a 30 minute offset).
- We do not have any registry keys on local machines that specify a GP Refresh rate.
- I cannot find any scheduled tasks that would invoke a refresh (Server 2012 feature)
- We've observed that if the SMS Agent Host (SCCM) is disabled, the constant refresh stops.
How can I tell where the manual refreshes are coming from? It's like a GPO Denial of Service attack. I understnad that GPUPDATE can be called through WMI or API calls.
How do I use network monitors to discover the origin!?