On an Endpoint Security (HX) appliance, the fe_services user has no access to Endpoint Security (HX) appliance functionality via the Web UI.
They have basic API access to Endpoint Security (HX) appliance features.
They can approve containment requests and stop containment of host endpoints.
They cannot maintain custom policy channels in the API.
They can run all CLI commands.
You cannot use the fe_services user or create additional fe_services users unless you have an MD_ACCESS license. In addition, the password for the fe_services user cannot be changed.