Between 03:15 UTC and 10:30 UTC on 16 Nov 2023, many partners experienced Transport Layer Security (TLS) exceptions when using our APIs such as “The request was aborted: Could not create SSL/TLS secure channel”.
Our cloud provider Microsoft Azure faced a global issue with one of the service we use in our infrastructure : API Management. This issue impacted the following regions : North Europe, West Europe and West US. They determined that a recent deployment on the service introduced a configuration bug that caused failures when trying to create client connections. This configuration prevented TLS interactions from succeeding, returning exceptions for a subset of users.
The issue was reported at 7:32 UTC because our internal probes were not impacted by the issue. After the different checks on our infrastructure were done, we contacted Microsoft’s support at 8:37 UTC and they confirmed the issue at 10:13 UTC. They rolled back the recent deployment of API Management service to mitigate the issue. At 10:30 UTC the service was up again.
After this outage, two actions have been decided :
NB: the official issue summary published by Microsoft Azure is available at https://app.azure.com/h/6LSL-JCG/b34b8a.