We're working on a CAS 7.0.0-RC7 with Duo Universal prompt for MFA.

We have the following in our configs for Duo:

build.gradle:
implementation "org.apereo.cas:cas-server-support-duo"

cas.properties:
cas.authn.mfa.duo[0].duo-integration-key=<our duo integration key>
cas.authn.mfa.duo[0].duo-secret-key=<our duo integration key>
cas.authn.mfa.duo[0].duo-api-host=<our duo api host>

Specifically not set in cas.properties is
"cas.authn.mfa.duo[0].duo-application-key=", which if I understand
correctly is the way to activate the Duo Universal Prompt [*].

I believe we also have the Duo side of things properly configured for their
Universal Prompt with the Duo Application being used by this CAS set to use
type "CAS (Central Authentication Service)".

Although it appears to work as expected, the following warning is logged:

WARN
[org.apereo.cas.adaptors.duo.authn.BaseDuoSecurityAuthenticationService] -
<Duo returned an Invalid response with message [Access forbidden] and
detail [Wrong integration type for this API.] when determining user
account. This maybe a configuration error in the admin request and Duo will
still be considered available.>

Does anyone know what this warning is for and how to resolve it?

[*] References
- <
https://apereo.github.io/cas/development/mfa/DuoSecurity-Authentication.html#universal-prompt
>
- <https://fawnoos.com/2023/01/29/cas70x-duo-security-mfa-universal-prompt/>
-- 
Baron Fujimoto <ba...@hawaii.edu> ::: UH Information Technology Services
minutas cantorum, minutas balorum, minutas carboratum descendus pantorum

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