No matter what your business, Microsoft's slate of Office software is as essential as desks and chairs - so much so that most workers are expected to know their way around it before they even get in the door. Whether you need an introduction, a brush-up or a level-up to your knowledge of these tools, the Microsoft Office Mastery Bundle is one of the quickest ways to learn. With more than 80 hours of total training, these seven courses cover all the essentials.