Exchange 2007 Concepts

The following table lists some of the basic components that are used to organize and administer Exchange. You will learn more details about each throughout this course.

Object	Description
Organization	The organization is the top Exchange infrastructure object. The organization defines your messaging environment. It includes the following: Exchange server Domain controllers Global catalog server Users
Server role	A server role is a logical set of features and services that allow users to perform specific tasks. Exchange 2007 offers the following five server roles: Client Access Mailbox Unified Messaging Hub Transport Edge Transport
Mailbox	A mailbox is a logical storage location associated with a recipient. The mailbox is where all e-mail messages are stored. The inbox and all other associated folders make up the mailbox.
Recipient	A recipient is a mail-enabled Active Directory object to which Exchange can send messages. A recipient has Exchange attributes, but it does not have to have a mailbox. Examples of recipients include the following: Mailbox users Mail users Resource mailboxes Mail contacts Distribution groups Dynamic distribution groups
Store	A store is a database of Exchange information. The store contains individual recipient mailboxes. All mailboxes in the store share common configuration settings.
Domain controller	The domain controller is the server within the Windows server domain that responds to authentication requests such as logging in and permissions assignment. The domain controller is effectively a database server. It contains a file called NTDS.dit which contains: The NT Directory service The directory information tree which is part of the X500 directory naming standard.
Storage group	A storage group is a collection of stores. All stores in the storage group are held on the same physical server.
Queue	A queue is a temporary holding space for messages waiting to enter the next stage of processing. Each queue is a logical set of messages that an Exchange transport server handles in a specific order. Queues only exist on machines that have the Edge Transport or Hub Transport server roles installed.
Address lists	An address list is a list of recipients. The global address list is an address list that is automatically generated by Exchange and which includes all recipients in the Exchange organization. In addition, you can define custom address lists.
Outlook	Microsoft Outlook is the premier messaging and collaboration client for the Internet and Microsoft Exchange Server. Outlook: Helps users communicate with others through e-mail, telephone, group scheduling, and real-time Microsoft NetMeeting conferencing software. Allows users to share information with others via Internet connectivity, Microsoft Exchange Server, and electronic forms, and as a component of customized collaborative solutions. Integrates and organizes communications and shared information in one application.
Outlook Web Access	Outlook Web Access (OWA) allows clients to access e-mail, calendars, contacts, tasks, and other mailbox contents when access to the Microsoft Outlook desktop application is unavailable. OWA: Offers read-only access to documents stored in Microsoft SharePoint sites and network (UNC) shares. Is provided as part of Exchange Server 2007 to allow users to connect remotely via a Web browser. Can perform many of the functions of Outlook. Requires a network connection to function.
Public folder	A public folder is a repository for data that can be accessed by multiple users. A public folder is a recipient that can have an associated e-mail address. Users can e-mail or post content into the public folder. Content in the public folder is accessible through the Outlook clients.

Exchange 2007 uses the following protocols:

Protocol	Description
Simple Mail Transfer Protocol (SMTP)	SMTP is the Internet standard protocol for transferring e-mail messages between hosts. SMTP assumes that both host and client are constantly connected, but you can use both permanent and dial-up connections to an SMTP host.
Messaging Application Programming Interface (MAPI)	MAPI is a set of standard commands developed by Microsoft. Messaging services use these commands to communicate with other MAPI-compliant applications. In Exchange 2007, the Client Access Server is responsible for all MAPI access. The only protocol used to communicate to a Mailbox server in Exchange 2007 is the MAPI RPC protocol.
Post Office Protocol version 3 (POP3)	POP3 is a mail-drop protocol designed to work with clients that are not always connected to the network. It allows a mail server to receive mail messages and store them on a server until the client comes back online and requests them.
Remote Procedure Call (RPC)	Remote Procedure Calls are based on a client/server model in which one server runs processes on another server. Both servers assume the calls are local, when in reality they run over LAN connections and through software libraries on both servers.
Internet Message Access Protocol version 4 (IMAP4)	Like POP3, IMAP4 is a protocol that allows a client to download messages from a server. (It does not allow you to send messages.) IMAP4 is much more powerful than POP3. For example, with IMAP4, you can open all folders in your mailbox, not just the Inbox, as well as public folders on the server.

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