In my post Removing the Application Catalog Role after Upgrading to ConfigMgr 1806 I mentioned the error Failed to compile rule "{Rule_WRC10000}": 0x8000ffff and that we were unsure of it’s impact on the client. The product group assured us that the error was nothing to worry about and they were right - I have seen no ill effects on my clients, even though I continually see this error whenever the clients process machine policies.| A Square Dozen | A. Gross Blog