[xakahnx]

Adding to the speculation here, I'm willing to bet some component of their issue is not entirely technical. Regardless of the underlying cause (PKI was mentioned), for downtime to last this long it almost definitely means some persistent data was lost or corrupted. Of course they can recover from a backup (I'm confident they have clean backups) but what does that mean for the business? "We irrecoverably lost 12 hours of data" could have severe implications, for example legal or compliance risks.

[pm90]

Why are you confident they have clean backups? It’s been my experience that backup infrastructure is usually not given much thought, engineers infrequently test that recovery from backups work as expected. Not saying that’s what it is but not sure if it can be ruled out.