Microsoft Defender Signature: Update Frequency

Tonight, the dashboard showed a single anomaly.

He typed back into the command prompt:

For three years, the Defender signatures updated like clockwork: every four hours, starting at 3:11 AM. Not 3:10. Not 3:12. 3:11. The previous admin had set it that way to stagger load after the 3:00 AM backup window. microsoft defender signature update frequency

And for the first time in 27 hours, the dashboard showed all 1,200 devices in perfect, synchronized health. Tonight, the dashboard showed a single anomaly