Due to recent telephony restrictions by the Chinese government, Duo is no longer able to deliver automated phone calls for authentication to users with +86 numbers. Duo Push authentication is not affected.
If you have a +86 number, each time you access an application that displays the Duo prompt, you will see the following screen:
Click Click here for more information to access the Duo Knowledge Base article at http://help.duo.com/s/article/5001 for additional information.
- Please note: SMS-delivered passcodes and Duo App Passcodes are no longer supported (as of June 22, 2022) due to changes in security policies.