Your phone has the mobile versions of Microsoft Office apps.
Review your notes and documents, make last-minute changes, or create new documents
View and edit PowerPoint presentations
Create, view, and edit Microsoft Excel workbooks
Save your Office files to SkyDrive, and pick up where you left off when you're back at your computer
Access the Office 365 service
With SharePoint Workspace Mobile, you can open, edit, and save Microsoft Office documents that are on SharePoint 2010 or SharePoint Online sites.
For more info, see the Office section in this user guide.
For more info on Office 365, see the video at http://www.youtube.com/watch?v=2QxiYmAerpw (in English only).