We have resolved the issue. We will be providing an RCA via our support portal in the next 2 business days. During this incident, Customized Exchange Public API Portals for unauthenticated users failed to load.
Posted 25 days ago. Jul 24, 2018 - 11:58 PDT
We have confirmed elevated error rates in Exchange Public API Portals for unauthenticated users and have identified the issue and expect to have it resolved soon.