Auth0 ACUL doesn't allow for customization of `mfa-otp-challenge`

nik.baleca
Tue, 10 Feb 2026 23:40:59 +0000

Thanks for the extra info @mike.huebner

Indeed, to use ACUL, you are required to configure a custom domain, especially for the more advanced screens.

However, you should still have more available then the login-id one.

I will need some time to investigate the matter and come back with a configuration guide on the matter.

Otherwise, just to double check, have you followed our documentation on ACUL regarding the setup and using an IaC(Auth0 CLI in your case)?

Kind Regards,
Nik