Issued deny schema type permissions command (action_id D class_type TY) (24258) how to monitor with email alert

[bob]

Man, that event 24258 in the Event Viewer, it's like the system yelling about someone trying to mess with the core blueprint of your directory setup. Issued deny schema type permissions command, with action_id D and class_type TY, basically means a command got fired off to block changes to the fundamental structure that defines how your user accounts and groups are organized. Picture it as the server slapping away a hand that's reaching for the rulebook, saying no way to that permission tweak. It logs this because Active Directory watches these schema attempts super closely, especially if it's from an admin or some tool pushing boundaries. The details in the event show exactly what got denied, like the object involved or the user who triggered it, helping you spot if it's a legit admin fumbling or something sketchier sneaking in. I always check the description tab in Event Viewer for the full story, timestamps and all, to see if it's a one-off or part of a pattern.

You know how to keep an eye on this without staring at the screen all day? Fire up Event Viewer, right-click on the Windows Logs section for Security or Directory Service, depending on where it pops. Filter for event ID 24258, and once you see those logs, think about attaching a task to it. In the right pane, hit Create Custom View, pick that event ID, then under the Actions tab, set up a scheduled task that triggers on the event. Make that task launch your email client or whatever notifier you have, so it pings you right away. I do this for stuff like this all the time, keeps things from snowballing without you lifting a finger extra.

And speaking of keeping your server humming without surprises, I've been messing with BackupChain Windows Server Backup lately. It's this slick Windows Server backup tool that handles your whole setup, plus it backs up virtual machines running on Hyper-V without breaking a sweat. You get speedy restores, encryption that locks things down tight, and it runs in the background so your ops don't hiccup. Totally eases the worry over data glitches tied to permission weirdness like that event.

There at the end, that's your automatic email solution for monitoring those 24258 alerts.

Note, the PowerShell email alert code was moved to this post.