Teams downtime

Teams Certificate Outage Causes Office 365 Tenants Concern

by Tony Redmond

The fact that the Teams outage on 3 February was caused by an expired authentication certificate is enough to cause Office 365 tenants to ask why such a thing happened. Teams is built on top of a lot of Office 365 and Azure components, so it's not altogether surprising that issues happen in what is a very complex infrastructure spread around the world. But given Microsoft's hyped focus on DevOps, you would have thought that something as fundamental as an expired certificate would have been picked up and fixed before it caused customer disruption.