Co-authoring - Simultaneously edit a file with multiple authors in different locations.Office Web Apps* - Post, edit, and share files from virtually anywhere.Outlook for Mac - Connect with integrated e-mail and calendar tools.Top Features of Microsoft Mac Office 2011 Microsoft Office for Mac 2011 gives you new and familiar tools to express yourself, share your work, and connect with the world around you. Microsoft Office Mac 2011 - Home and Business Editions Introducing Microsoft Office for Mac 2011