According to this article, Outlook 2002 features indexing and search functions for all content in Exchange 2000 Server – including messages, documents, contacts, tasks, calendar items, and other data.
That’s a limited feature, because most small businesses aren’t using Exchange 2000 Server. But it’s a valuable addition to Outlook if you are using Exchange 2000 – and it’s yet another good reason for a small business to look into Small Business Server 2000, which includes Exchange Server 2000.