Telephony Inline Hook with Twilio Error "Custom Code not allowed"
Jun 9, 2025
Multi-Factor Authentication
Okta Identity Engine
Overview
When trying to integrate Telephony Inline Hook with Twilio, the following error is encountered:
Custom Code not allowed.
Applies To
- Multi-factor Authentication (MFA)
- Telephony Inline Hook
- Twilio
- Okta Identity Engine
Cause
Custom Verification Code in Twilio Console is not configured properly.
Solution
- For an existing Service, enable Custom Verification Code in the Twilio Console by navigating to Verify > Services and selecting the Service. This will open the Service settings page.
- Select the existing Service under Friendly Name.
- Go to the General tab and scroll down to Code configuration.
- Check/enable the Enable Custom Verification Code option for that Service.
- Once enabled on the Service, follow the steps listed in Custom Verification Codes to submit custom verification codes.
