Definīcija: A piece of the user interface (UI) in Outlook Web Access that can be hosted in iframes as part of other Web applications such as SharePoint Portal Server portals. Outlook Web Access exposes a set of Outlook Web Access Web Part URLs that allow other applications to request certain portions of the Outlook Web Access UI. For example, another application can load the Outlook Web Access Web Part URL for the Inbox, Calendar, or Contact folder into an iframe hosted in that application.