Synchronizing MOSS 2007 and Outlook 2007 helps you store contacts and tasks in one location. This prevents the replication of information or storing of outdated information.
You can use Outlook 2007 as your preferred application for collaborating with other team members in your organization. Outlook 2007 gives you a full two-way synchronization option that helps you integrate SharePoint contact management, task management, e-mail management, and event and meeting management with the Outlook 2007 client application. In addition, you can use Outlook 2007 to make lists and document libraries offline, work on them, and then synchronize them with MOSS 2007 when reconnected.