Office 365 Enterprise E3 (Government Pricing) and Office 365 Enterprise E4 (Government Pricing) include the latest desktop version of Office, which delivers the best experience for your employees and makes it easy for IT to manage deployment and upgrades. For the Office 365 plans that do not come with the latest desktop version of Office, Office 365 works with the latest version of Office, Office 2013, and Office 2011 for Mac, so you can take advantage of the rich Office 365 cloud services such as business-class email, HD video conferencing, and file sharing.