Implement and fully support Shibboleth as a documented authentication method.
Many environments, particularly large education institutions, rely on Shibboleth as the sole authentication system. As more departments and colleges on our campus alone are exploring new help desk software options full Shibboleth support, including documentation, account creation, and attribute synchronization on login, would be a significant selling point.
We were able to implement a workaround using an Apache proxy, Shibboleth login hook and the WHD API to present the users with the federated login page, sync the necessary data with WHD, and then login but it breaks during updates and we had to figure it out without assistance from support. We haven't tried changing this with the 12.5.x versions but the 12.4 versions did not work when trying to use the SAML 2.0 support within WHD.