01-31-2022, 11:23 AM
I remember this one time at my buddy's shop. Their ancient inventory software was running on the server, spitting out failed logins every hour. It was like the app had a grudge. We watched the event viewer fill up with errors. The whole team couldn't log in for work. Frustrating, right?
But here's the fix we tried first. You check those login attempts in the security logs. See which user it's hitting. Often it's a service account from the legacy stuff. Then, tweak the password policy to give more tries before lockout. Or, update that old app if possible. Patch it up. Sometimes isolating it on a separate machine helps. If it's mapped drives causing it, remap them right. And don't forget cached credentials. Clear those out on client machines. We did all that and it stopped cold.
Hmmm, or if it's deeper, like Kerberos tickets going wonky, reset the computer account in AD. That usually straightens it. You might need to restart services too. Covers most cases, I think.
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