DUO50: Phone call authentication issues for a small fraction of users
Incident Report for Duo
During the process of an update rollout to the DUO50 deployment, the Duo engineering team noticed a slight increase in phone callback authentication failure. This was determined to be due to an issue with the update that affected customers that had a custom telephony cost maximum set.

Our team worked quickly to roll back the update so that only a very small fraction of authentications were affected. Moving forward, the update will be patched and tested thoroughly before the next rollout to avoid this happening again.

All other authentications and Duo deployments were unaffected during this time and remain operational, and all phone call authentications are currently operational as well.
Posted Jul 10, 2018 - 18:46 EDT
This incident affected: DUO50 (Phone Call Delivery).