Public folders containing Contacts and Calendar folders everyone can
reference, mailbox sharing and delegation so that assistants can screen
mesages for executives and send mail on their behalf, server-based antivirus
scanning so that individual client systems don't have to do that, rules that
work even when the client machine is not running, a global address list so
that all employee mail addresses are available and don't have to be
duplicated in each person's Contacts folder are some of the advantages.