Your new Windows RT powered tablet comes with Office Home &Student RT Preview - preview editions of new Word, Excel, PowerPoint and OneNote applications built especially for your tablet.
If the Unread Mail Search Folder is missing, you can restore it.
To check mailbox size, in the Mail view, click your account. On the ribbon, click Folder, and then click Folder Properties. Then, click Folder Size.
The Folder Pane in the Outlook window is how you switch between the folders you use to organizer messages and other Outlook items.