--- title: 4909(-) The local policy settings for the TBS were changed. (Windows 10) description: Describes security event 4909(-) The local policy settings for the TBS were changed. ms.pagetype: security ms.prod: w10 ms.mktglfcycl: deploy ms.sitesec: library author: Mir0sh --- # 4909(-): The local policy settings for the TBS were changed. **Applies to** - Windows 10 - Windows Server 2016 Currently this event doesn’t generate. It is a defined event, but it is never invoked by the operating system. ***Subcategory:*** [Audit Other Policy Change Events](audit-other-policy-change-events.md)