What is your actuator endpoint configuration in your CAS properties? Make sure you have at least the following:
management.endpoints.web.exposure.include=*
management.endpoint.importRegisteredServices.enabled=true
cas.monitor.endpoints.endpoint.defaults.access=IP_ADDRESS
cas.monitor.endpoints.endpoint.defaults.requiredIpAddresses=<IP regular expression match>
The management.endpoints.web.exposure.include statement should be switched to a list of allowed end points on a production environment.
The IP regular expression for an IPv4 address: “12\.210\.12\.34”