SharePoint 2010 web parts allow for smooth integration with Exchange OWA, allowing for inboxes, calendars, and other mail data to be accessed directly from a SharePoint site. SharePoint 2010 contains built-in web parts to link to Exchange OWA content, and integrates best with Exchange 2010 OWA. Older versions of Exchange, such as Exchange 2003 OWA, are supported, but the integration is not as tight.