APM Server acts as a proxy between your APM agents and the APM app. The APM app communicates any changed settings to APM Server so that your agents only need to poll the Server to determine which central configuration settings have changed.
To grant an APM Server user with the required privileges for managing central configuration, assign the user the following privileges:
Allow APM Server to manage central configurations via the APM app
Looking for privileges and roles needed use central configuration from the APM app or APM app API? See APM app central configuration user.