Configure Oracle Reports 12c (12.2.x) for destype=file

I currently had in a project a request, that Oracle Reports should be generated with the option destype=file to a specific location on the server which is hosting the Oracle Forms & Reports 12c environment.
Since Oracle Forms & Reports 12c, the so called "File System Access Control" is enabled by default, so any request like http://<server>:<Port_of_ManagedServer_Reports>/reports/rwservlet?report=test.rdf&userid=test/test@db1&destype=file&desformat=pdf&desname=/u00/app/oracle/demo_app/rep_output/test.pdf&server=rep_server1...