I’m looking to set up voice OTP for passwordless connections. I’m pretty sure this is not possible with Auth0’s built in capabilities from previous topics (/passwordless-otp-with-voice/107753), but I just wanted to triple check and also get some clarification on the language used around phones/MFA/passwordless.
I see in the docs (/docs/customize/phone-messages/configure-phone-messaging-providers/configure-a-custom-phone-provider) we can configure custom phone providers via the Branding > Phone Providers section of the dashboard. Does this mean that all phone notifications, including those for Passwordless logins, would then be routed through that custom provider?
In general, I find it quite confusing whether Auth0 is referencing MFA vs Passwordless when “phone” and “email” are used within the docs and on the dashboard.
When setting up a custom phone provider, it can be applied for Passwordless besides using it for MFA. Basically, when you set up a passwordless connection from the Auth0 Dashboard from Authentication → Passwordless → SMS → Configure, you can the option to enable "Use Tenant-Level Messaging Provider.
However, Voice OTP is not available at this time for Passwordless connections unfortunately, this is an item currently in the backlog however there is no ETA when it will reach general availability. I would recommend keeping an eye on the Auth0 Changelog for the time being. If the feature will become available soon enough or an ETA will be announce, I will make sure to let you know!
@nik.baleca Could you theoretically configure a custom provider that sends a voice OTP to mimic a voice OTP option? And the connection would still be sms on the Auth0 side?
For example, /docs/customize/phone-messages/configure-phone-messaging-providers/configure-a-custom-phone-provider/configure-a-custom-phone-provider-with-twilio-verify says you can configure twilio verify as a custom phone provider and then use the voice option. Does that mean you could set up voice OTP for passwordless?
Regarding the documentation you have provided, I am not 100% sure if it will work. You would need to configure the logic on your phone provider to send voice messages even if Auth0 sends the option for an SMS. You could give it a try however I do not believe it will work.