Duo CA Pinning Bundle Update – Action Required for Out-of-Date Clients Impacting All US Deployments

Beginning February 2nd, customers running out of date applications and clients that connect to Duo’s servers will experience connection/authentication failures. If you are impacted by this, you will want to ensure that you update all affected applications and Duo Mobile apps on devices to the latest version with the new Duo CA pinning bundle. This change is related to Cisco Field Notice FN74372, which provides additional details about the update and its impact: https://www.cisco.com/c/en/us/support/docs/field-notices/743/fn74372.html You can identify if you are impacted by navigating to the "Unsupported Clients Log" report in the Duo Admin Panel found at Reports > Unsupported Clients Log. You can use this report to find and update any apps/clients running affected software versions. For full details and guidance, including the minimum unaffected versions and how to update these clients, please refer to our documentation: https://help.duo.com/s/article/9451