With Microsoft Exchange Server 2010 you can achieve new levels of reliability & performance with features that simplify your administration, help protect your communications, & delight your users by meeting their demands for greater mobility. Microsoft Exchange Server is a flexible & reliable messaging platform that can help you lower your messaging costs by 50-80%, increase productivity with anywhere access to business communications, & safeguard your business with protection & compliance capabilities that help you manage risk. The Standard CAL allows for the use of e-mail, shared calendaring, contacts, task management, Outlook Web Access, & Exchange Active Sync.