1. First you have to run the rrWorkstationInstaller install the submission plugin.
    Please make sure that Submission Plugins is enabled and after installation that Unreal Engine is mentioned in the log among the other render applications. 
    If it isn't, please add your Unreal Engine install paths to the file render_apps\_install_paths\Unreal Engine.cfg. 
    (rrWorkstationInstaller updates the UE_PYTHONPATH variable)

  2. Start Unreal Engine. 
    From the main menu, select Edit > Project Settings.
    Search for Movie Render Pipeline in the search browser.
    In the Moviepipeline settings, please set the Default Remote Executor to MoviePipelineRoyalSubmit:

  3. From the MovieRenderQueue window, press Render Remote to launch rrSubmitter. 
    Only jobs with a PipelineConfig setting are sent to RR. 
    For Example the third job in the screenshot below will not be sent:

  4. rrSubmitter should list the jobs from the MovieRenderQueue.
    We use the Unreal Map as the Render Scene, and the Sequence as the job Layer. 
    For now we are only converting the following tokens:
    A master sequence is split into multiple RR jobs, one for each shot.
    The master shot can still be enabled in rrSubmitter.

Known issues (with RR v9.1.00, might have been fixed in a later version)

If you select a .mov output or if you are using different channels and forget to set the channels variable in your output settings, then RR is not able to find the output.
Please enable the job option "Do not check for frames" in the rrSubmitter in this case.