This old mail should help. It's specific to 5.1 but I don't think the logic or settings names have changed. You will find these associated with the default process pool in E3 Config unless you already have customizations to these or related settings set. Not all of them may be present in your config file, though, if you are running defaults. Some are required, DTD-wise, and so will be present. I just don't remember which ones.