Today we are excited to announce deeper integration between Outlook and our other key Office apps for iPhone and iPad—Word, Excel and PowerPoint—designed to make it easier than ever to collaborate on and share Office documents on the go. In many organizations, Word, Excel and PowerPoint documents capture the bulk of the knowledge and experiences that information workers produce—strategy documents, sales presentations, contracts, market analyses, etc. In our personal lives, these documents contain to-do lists, travel itineraries, monthly budgets and more. This information is then frequently shared with others in email using Outlook.
Read more at source: https://blogs.office.com/2015/08/20/deeper-integration-between-office-documents-and-outlook-for-ios/