Microsoft Office 365 combines Office, Sharepoint, Exchange and Lynch in a cloud service that works with most browsers, smartphones and desktop applications.
Microsoft offers 2 versions-- one for small businesses, professionals and companies with fewer than 25 employees and an enterprises version for midsize/large businesses and government organisations.
Office 365 for enterprises also includes an option to get Office Professional Plus desktop software on a pay as you go basis for the first time.
In 2011 Office 365 will also include Microsoft Dynamics CRM online, as well as offer a version for education needs.