Issued deny database role permissions command (action_id D class_type RL) (24216) how to monitor with email alert

[bob]

I remember stumbling on this event ID 24216 in the Event Viewer logs one late night, you know, when you're just poking around Windows Server to see what's ticking. It pops up as "Issued deny database role permissions command (action_id D class_type RL)", which basically means someone or something tried to lock down database roles by denying certain permissions. Think of it like revoking access keys to a room full of sensitive files. The action_id D flags the deny part, and class_type RL points to role-level stuff in the database setup. This event gets logged whenever a command executes that strips away those role permissions, often in SQL Server environments tied to your Windows setup. It's not always bad, could be admin doing routine housekeeping, but if it's unexpected, it might signal someone messing with privileges. You see it under Security or Application logs, depending on how auditing's configured. Details in the event include who issued it, what roles got hit, and timestamps, helping you trace if it's legit or a red flag for unauthorized tweaks.

Now, monitoring this without getting too deep into code, I like using the Event Viewer itself to trigger alerts. You open Event Viewer, right-click on the log where these show up, say Windows Logs > Security. Then pick Attach Task To This Event or something similar under Actions. Set it for event ID 24216 specifically. Choose to run a program or script, but keep it simple by linking to a basic task scheduler job. In Task Scheduler, you create a new task that fires on that event, and for email, you point it to send via your server's mail setup, like using the old mailto or a lightweight notifier. It watches constantly, so when 24216 hits, bam, you get pinged. I set mine up once for a buddy's server, took maybe 15 minutes fiddling with the filters. Makes life easier, no constant checking needed. Or, if you're lazy like me sometimes, tweak the task to email right away without extra steps.

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