Bala
By default when we install and configure WebAgent or CA Access Gateway, the default setting is not defined in SmHost.conf. When not defined, the default is "NO".
When specified in SmHost.conf manually, we have to restart the WebAgent or CA Access Gateway for the parameter itself to take effect. After that any changes that are done to adding Policy Servers OR removing Policy Servers, will be automatically picked by WebAgent / CA AG.
This setting only applies to Hostname (Policy Server) being added OR removed in a standard OR clustered HCO configuration. This parameter does not cover any other parameters / fields in HCO. I think that is the design.
For e.g. Things that are handled.
[1] We add OR removed a new line entry of clustered policy servers.
[2] We added OR removed a single policy server from a Cluster.