A virtual container in Microsoft Exchange that lets Microsoft Exchange Server administrators group recipients according to common attributes. These containers are created automatically when you establish the defining attributes for the address book view.
For example, using the Exchange Administrator program, you could create an address book view called By Department and use the Department attribute of the recipients in your Exchange organization to automatically generate various address book view containers called Sales, Marketing, Management, and so on.
Each address book view container will contain only those recipients that belong to a specific department. For instance, when users access the global address list using Microsoft Outlook, these containers will be visible in their address books, along with their recipients. This allows users to more quickly address e-mail to recipients in a particular department instead of scrolling down the entire global address list.
You can also create multilevel address book views. For example, you could create a first level of virtual containers sorted by Country, followed by a second level sorted by State.