In addition to group functions such as shared calendars and contacts, delegation and appointments, the
Exchange Server functionality also provides Outlook to any user on the web
via Outlook Web Access, plus features like
ActiveSync (remote wipe, security policies, PIN lock for mobile devices), email protocols for other accounts, antispam and antivirus, bigger mailboxes, retention settings and permissions for end users, as well as lots of add - ons and integration with business applications.