OfficeCalendar is a computer software program that is an alternative to Microsoft Exchange Server. OfficeCalendar allows its users to share Microsoft Outlook calendar, email, contact, and task information with other Microsoft Outlook users on a computer network. OfficeCalendar makes Outlook calendar sharing and group scheduling easy and affordable with its interactive group calendars because it does not require Microsoft’s Exchange Server, which is considered too expensive and too complicated for small businesses.