Outlook Calendars are one of the most underused, and yet powerful tools, within the Office suite of applications. Calendars can be shared across a team or entire organization, showing the schedules of a group of people or resources. For example, you can view the schedules of people in your department or availability of conference rooms in your building. This helps you schedule meetings quickly.
If clients do not use Outlook Online, you can have Calendar insert your availability in the body of an email message to keep business moving forward. With the Delegate Access feature, one person can use his or her own copy of Outlook to easily manage another person’s calendar, creating or modifying on behalf of a colleague.