Google Apps Sync for Microsoft Outlook

Google Apps Sync for Microsoft Outlook® allows you to use Microsoft Outlook® 2003, 2007, 2010 and 2013 effectively with Google Apps. You get the cost savings, security and reliability of Google Apps, while employees can use the interface they prefer for email, contacts, calendar and notes https://tools.google.com/dlpage/gappssync "Google Apps Sync is only available for Google Apps for Business and Google Apps for Education accounts. Free Gmail accounts are not supported."