This guide provides an overview of the Courier job orchestration platform offered by Progress. It outlines how Courier helps IT operators, InfoSec engineers, and DevOps teams to manage unplanned work through effective job orchestration and automation. The document details various features of Courier, including APIs for integrating actions into automation systems, a command-line interface for terminal users, and an intuitive user interface for creating job templates and reports. The guide explains the fundamentals of job definitions, including the concepts of jobs, job instances, and steps involved in executing tasks. It describes the execution types available, such as sequential and parallel runs, and how batching can be implemented to control job run execution across nodes. Additionally, the guide covers schedule management for jobs, including immediate, scheduled, and chronic runs, along with defining exceptions to these schedules. Overall, it delineates the capabilities of Courier to streamline operational tasks and enhance productivity for various user roles.