Exchange is often thought of as only being an e-mail server. The Exchange product contains a number of additional components, such as calendars, contacts, and tasks. Use this reference to quickly understand the different aspects of Exchange.

Component Description
Mail E-mail is probably the most used for of communication in the modern age. Exchange excels at handling e-mail. You connect to Exchange using an e-mail client such as Outlook.
Calendar If you use Outlook then you are familiar with booking your meetings and appointments on the Calendar tab. Exchange is the actual product that handles these events because Outlook is just the client.
Contacts Having a place to store all of your contacts is critical in today’s connected world. With Exchange all of your contacts are stored on the server and can be accessed to by any connected device. For example, you can use your mobile phone, laptop, home computer, or work computer. You can even connect by using any computer that has a web browser through Outlook Web Access (OWA).
Tasks Unless you have the memory of a savant then you probably work from a task list. When you store your tasks in Outlook you are actually storing them out in the cloud in Exchange. Just like the other aspects of Exchange, your tasks are available from any connected device. Because your tasks are in Exchange, you can add a task on your laptop and have it instantly available on your work computer when you login.