Good versus bad
When setting up hot folders in pdfToolbox Server, there is always one input folder from which PDF files are picked up. Next, you can define multiple output folders, and the processed PDF file will be dropped in one of those output folders depending on the processing result. This makes it possible to setup a workflow where all good files (the ones not generating any errors during preflight for example) are dropped in one output folder, while files with errors are dropped into another folder.