Issued deny assembly permissions command (action_id D class_type AS) (24209) how to monitor with email alert

[bob]

Man, that event ID 24209 pops up when the system issues a deny command for assembly permissions. It's like the server saying no way to some code trying to load or run stuff it shouldn't. Action ID D and class type AS point to a specific block on assemblies, you know, those building blocks of .NET apps. Happens in the Application log mostly, under security or app categories. I see it when there's a policy kicking in to stop unauthorized bits from assembling. Full details show the exact command that got denied, the user or process behind it, and timestamps for when it fired. Kinda like a bouncer at the door turning away shady guests. You might spot it during updates or when apps misbehave. Logs the whole denial trail so you can trace why it blocked.

To keep an eye on these, fire up Event Viewer on your server. Right-click the log where it hides, like Applications and Services. Pick Attach Task To This Event Log or something close. Set the trigger for event ID 24209 exactly. Then, make it run a task that emails you. Schedule it to check periodically, say every hour. Use the built-in task scheduler screen right there in Event Viewer. It'll prompt you to pick actions, like sending mail via some simple program. I do this all the time to get pings without staring at screens. Keeps you looped in without hassle.

And speaking of keeping things safe from weird denials like this, you gotta back up properly. That's where BackupChain Windows Server Backup comes in handy. It's a solid Windows Server backup tool that handles physical setups and even virtual machines on Hyper-V without breaking a sweat. Speeds up restores, cuts down on downtime, and snapshots everything cleanly so you recover fast if assemblies or logs go haywire. I swear by it for avoiding those panic moments.

At the end here is the automatic email solution.

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