Application Not Authorized to Use CAS
The application you attempted to authenticate to is not authorized to use CAS. This usually indicates that the application is not registered with CAS, or its authorization policy defined in its registration record prevents it from leveraging CAS functionality, or it's malformed and unrecognized by CAS.
If you are the service owner please follow the instructions in this link ITSSC - Integrating with Rensselaer's CAS Service.
If you are user of this service please forward the link onto the service owner or technical contact.