Tài liệu Module 11: Accessing Microsoft Exchange 2000 with Outlook Web Access docx

Examining Outlook Web Access Components and Process In this topic, discuss the different components that enable Outlook Web Access clients gain access to Microsoft Exchange 2000 data.. O

Contents

Overview 1

Introduction to Outlook Web Access 2

Examining Outlook Web Access Components

Lab A: Sending E-mail Messages by Using

Configuring an HTTP Virtual Server 21

Securing Outlook Web Access

2000 with Outlook Web Access

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Instructor Notes

This module provides with students of an overview of Microsoft® Outlook® Web Access functionality Students examine the components of Outlook Web Access and learn how they work together to process client requests Students will be able to create and configure an (Hypertext Transfer Protocol) HTTP virtual server In addition, they will learn Outlook Web Access security and firewall configuration options

After completing this module, students will be able to:

! Describe the benefits of Outlook Web access, the capabilities that DAV (Distributed Authoring and Version) provides to Outlook Web Access users, and the clients that are supported by Outlook Web Access

HTTP-! Explain the function of each component used by Outlook Web Access to process a client request in a single server environment and front-end/back-end environment

! Create and configure an HTTP virtual server

! Describe the authentication and encryption methods available when using Outlook Web Access with a single server configuration and a back-end/front-end server configuration

Materials and Preparation

This section provides you with the required materials and preparation tasks that are needed to teach this module

Required Materials

To teach this module, you need the following materials:

! Microsoft PowerPoint® file 1572a_11.ppt

Preparation Tasks

To prepare for this module, you should:

! Read all of the materials for this module

! Read the white paper, “Outlook Web Access in Exchange 2000 Server,” located in the Additional Readings folder on the instructor compact disc

! Complete the labs

Presentation:

60 Minutes

Lab:

45 Minutes

Module Strategy

Use the following strategy to present this module:

! Introduction to Outlook Web Access

In this topic, briefly explain the function of Microsoft Outlook Web Access Describe the features and limitations of Outlook Web Access Next,

describe the function that Hypertext Transfer Protocol-Distributed Authoring Version (HTTP-DAV) provides Outlook Web Access users Review the clients and operating systems that Outlook Web Access supports; explain the difference in functionality between Web browsers and their versions

! Examining Outlook Web Access Components and Process

In this topic, discuss the different components that enable Outlook Web Access clients gain access to Microsoft Exchange 2000 data Next, provide

an step-by-step explanation of how the different components process client requests Next, explain how the process differs when using front-end/back-end server configuration By understanding the components and the process,

it will help students troubleshoot related issues Lastly, briefly review the directories and aliases that are associated Outlook Web Access

! Configuring an HTTP Virtual Server

In this topic, briefly explain how to configure and HTTP virtual servers and how to connect to and disable the virtual server The important point to discuss is how Active Directory and the Directory Service to metabase (DS2MB) service both update the virtual server configuration information in the metabase

! Securing Outlook Web Access Communications

In this topic, explain the benefits and limitations of each authentication method Explain the authentication limitations when using a front-end/back-end server Next, discuss Secure Sockets Layer (SSL) encryption and how it

is implemented in a standard configuration versus a front-end/back-end server configuration Lastly, discuss the firewall placement options and the benefits and limitations of each placement option

Customization Information

This section identifies the lab setup requirements for a module and the configuration changes that occur on student computers during the labs This information is provided to assist you in replicating or customizing Microsoft Official Curriculum (MOC) courseware

The labs in this module are also dependent on the classroom configuration that is specified in the Customization Information section at the

end of the Classroom Setup Guide for course 1572A, Implementing and

Managing Microsoft Exchange 2000

! Complete the labs for Module 2, “Installing Microsoft Exchange 2000,” in

course 1572A, Implementing and Managing Microsoft Exchange 2000

! Install Exchange 2000 at D:\Program Files\Exchsrvr on each server into an organization named Northwind Traders Components installed are Microsoft Exchange Messaging and Collaboration Services, Microsoft Exchange System Management Tools, and Microsoft Exchange Instant Messaging Service Have the students create a custom MMC in the C:\Documents and

Settings\All Users\Desktop that is saved as your_firstname Console The

MMC contains the Active Directory Users and Computers snap-in and the Exchange System

snap-in

Setup Requirement 2

The labs in this module require a custom organizational unit, a user account for each student, a mailbox for each student, an Outlook profile, and for the Domain Admins group to be delegated full control of the organization To prepare student computers to meet this requirement, perform one of the following actions:

! Complete the labs for Module 3, “Administering Microsoft Exchange

2000,” in course 1572A, Implementing and Managing a Microsoft

Exchange 2000

! Create an organizational unit in Active Directory that is named

your_servernameOU for each server in the classroom Create a user account

in each server’s OU for each student The account is a member of the Domain Admins group and has a mailbox on the student’s Exchange server Create an Outlook profile for each student on their own server that opens their mailbox Delegate the full administrator role on the Northwind Traders organization

Important

Lab Results

There are no configuration changes on student computers that affect replication

or customization

Overview

Process

Outlook Web Access enables users to gain access to their Microsoft Exchange

2000 mailboxes by using an Internet browser By deploying Outlook Web Access, you provide access to data in public folders, network shares, and company intranets to remote and local users

After completing this module, you will be able to:

! Describe the benefits of Outlook Web access, the capabilities that DAV (Distributed Authoring and Version) provides to Outlook Web Access users, and the clients that are supported by Outlook Web Access

HTTP-! Explain the function of each component used by Outlook Web Access to process a client request in a single server environment and front-end/back-end environment

! Create and configure an HTTP virtual server

! Describe the authentication and encryption methods available when using Outlook Web Access with a single server configuration and a back-end/front-end server configuration

In this module, you will learn

how to deploy Outlook Web

Access in a single-server

environment and a front-end

back-end server

environment

# Introduction to Outlook Web Access

Outlook Web Access enables users to access their Exchange 2000 mailbox using a Web browser, such as Microsoft Internet Explorer Outlook Web Access can also provide access to mailbox data from UNIX, Macintosh®, and Microsoft Windows®-based computers that are connected to a server running Exchange 2000 These users can view and work with any public folder, mailbox, global address list, or calendar

For UNIX users connecting to a server running Exchange 2000, Outlook Web Access is the primary solution for e-mail, calendar, and collaboration functionality

Outlook Web Access uses HTTP-DAV to access mailbox data in Exchange

2000 With the integration of Internet Information Services (IIS) with Exchange

2000, Outlook Web Access uses components from both platforms to send and receive client requests to the client

environment for users to

access Exchange 2000 data

by using an Internet

browser, such as Microsoft

Internet Explorer

Note

Outlook Web Access Benefits and Limitations

Limitations Benefits

Supports messages that contain embedded items and Microsoft ActiveX objects

Supports messages that contain embedded items and Microsoft ActiveX objects

Supports public folders that contain contract and calendar items

Supports public folders that contain contract and calendar items

Supports multimedia message Uses named URLs to reference items Supports front-end and back-end server configuration

Supports front-end and back-end server configuration

Supports Microsoft Internet Explorer 5

Supports Microsoft Internet Explorer 5

No Offline access

No advanced security

No advanced e-mail functions

No calendaring and group scheduling

No task management

Outlook Web Access provides Internet users a convenient method for accessing Exchange 2000 However, it may not provide the client messaging solution for all users

Benefits

Outlook Web Access provides increased client performance and functionality

by providing the following benefits

! Supports messages that contain embedded items (messages, appointments, contacts, and so on) and Microsoft ActiveX® objects For example, when a user opens a message containing an ActiveX object, Outlook Web Access renders and displays the object

! Supports public folders that contain contact and calendar items

! Supports multimedia messages Outlook Web Access enables you to easily

add and send audio and video files

! Reference items by using a named Uniform Resource Locators (URLs) Previous versions of Outlook Web Access used globally unique identifiers (GUIDs) to access items like messages, folders, and so on from the Information Store Outlook Web Access now accesses these items using URLs, such as http://server/exchange/mailbox/inbox This simplifies accessing Information Store data for users and developers

! Supports front-end and back-end server configuration, which improves performance and provides scalability of Exchange 2000

! Supports Microsoft Internet Explorer 5 Internet Explorer 5 users benefit from an interface that is similar to Microsoft Outlook 2000 Outlook Web Access is also more efficient for Internet Explorer 5 users because it does not require that constant communication with the server running Exchange

Topic Objective

To summarize the features

and limitations of Outlook

Web Access in Exchange

2000

Lead-in

Outlook Web Access

provides remote users with

an efficient method to

access their e-mail

However, it may not provide

the messaging solution for

all users

Limitations

Outlook Web Access was not designed to provide all of the advanced e-mail functions and collaborative solutions that are provided by Microsoft Outlook

2000 As a result, Outlook Web Access does not support the following:

! Offline access A user must connect to a server running Exchange 2000 to

view mailbox data Outlook Web Access offers no offline support or synchronization capabilities

! Advanced security Outlook Web Access does not support Exchange 2000

digital encryption, signature support, and Secure/Multipurpose Internet Mail Extensions (S/MIME) support

! Advanced e-mail functionality Outlook Web Access does not include

replied and forwarded flags in list view, message flags and Inbox rules, three-pane view, search for messages, and WordMail and Microsoft Office integration

! Calendar and group scheduling Outlook Web Access does not support

displays of discontinuous days side-by-side, appointment list views, view detailed free and busy time, track acceptance of meeting attendees, and export to devices such as DataLink watches

! Task Management Outlook Web Access does not support task management,

however, you can view and read tasks

Benefits of HTTP-DAV

Information Store

Information Store

IIS Exchange 2000

Microsoft

web accessOutlook

HTTP-DAV

Outlook Web Access uses HTTP-DAV to gain access to the Exchange 2000 mailbox data HTTP-DAV is an extended version of HTTP, the standard protocol that enables Web browsers to communicate with Web servers

HTTP-DAV is defined in Request for Comments (RFC) 2518 For more information about HTTP-DAV, see http://www.webdav.org/

HTTP-DAV provides the following functionality:

! Overwrite protection (file locking) HTTP-DAV enables Web users to write,

edit, and save shared documents without overwriting another user’s work, regardless of which software program or Internet service they are using Overwrite protection is the key to the collaboration support in HTTP-DAV

! Namespace management Namespace management capabilities enable users

to conveniently manage Internet files and directories, including the ability to move and copy files

! Property (metadata) access Property access feature of HTTP-DAV is an

efficient means of storing and retrieving metadata information about a Web document Metadata information includes information such as the author's

name, copyright, publication date, and keywords Internet search engines use metadata to find and retrieve relevant documents

Web folders and Web forms also use HTTP-DAV to access Exchange

2000 data For more information on using HTTP-DAV for accessing Exchange

2000, see course 2019, “Building Solutions in Microsoft Exchange 2000 with

the Web Storage System.”

Outlook Web Access Client Support

$ Internet Explorer 3.x and later

$ Netscape Navigator 3.x and later

$ DHMTL and XML

$ Drag and Drop Functionality

$ Rich Text Formatting

Outlook Web Access supports several Web browsers, including Internet

Explorer 3.x and later versions, and Netscape Navigator 3.x and later versions

You can also use Outlook Web Access with browsers that support Hypertext Markup Language (HTML) 3.2 and European Computer Manufacturer Association (ECMA) compliant JavaScript

These browsers may be running on operating systems such as Apple Macintosh,

Microsoft Windows 3.x, Microsoft Windows 95, Microsoft Windows 98,

Microsoft Windows NT®, or UNIX

Outlook Web Access takes advantage of the capabilities of Internet Explorer 5 allowing for more advanced functionality

Outlook Web Access with Internet Explorer 5

Outlook Web Access uses dynamic Hypertext Markup Language (DHTML) and Extensible Markup Language (XML) to provide advanced functions for collaboration applications used by Internet Explorer 5 and later versions Internet Explorer 5 users can drag and drop messages between folders and use a folder tree control to open and create new folders When creating a message, Internet Explorer 5 users can use rich-text editing features to add formatting to the text Internet Explorer 5 also supports HTML text composition and viewing messages by using the Preview pane view

Because Internet Explorer 5 supports DHTML, Outlook Web Access also uses the same DHTML functions By using DHTML, Outlook Web Access

encapsulates HTML and script, which is downloaded to the client only once

For all other clients, such as Internet Explorer 4.x and Netscape Navigator, most

of the rendering is performed on the server with a small amount of JavaScript downloaded to the client This enhancement improves the performance of the Outlook Web Access client by reducing the number of calls to the server

Topic Objective

To list the categories of

Outlook Web Access clients

Lead-in

Outlook Web Access is

optimized for Internet

Explorer 5, but also

supports other browsers and

earlier versions of Internet

Explorer

Feature Comparison

The following table compares the functions available in the full version of Outlook 2000 along with the features available with Outlook Web Access in Exchange 2000 and Exchange Server 5.5

Function Outlook 2000

Outlook Web Access using Internet Explorer 5

Outlook Web Access in Exchange Server 5.5

Drag-and-Drop Editing

5 only)

No

Shortcut menus (accessed by right-clicking)

5 only)

No

# Examining Outlook Web Access Components and Process

To complete an Outlook Web Access client request, components in Exchange

2000, Internet Information Services (IIS), and Windows 2000 must communicate to process the request It is important to have a solid understanding of the client request process and the relationships between the components before deployment

2000, and IIS components

to process client requests

Components Used by Outlook Web Access

Metabase

DS2MB

ExProx DAVEx

Active Directory

Active Directory

A directory service that stores configuration information related to Exchange

2000 objects For example, it stores the name of each mail-enabled user’s Exchange 2000 server

Exchange 2000 Components

Several Exchange 2000 components are involved in transferring messages and rendering them on a browser

! Information Store Contains mailbox and public folder data

! DSAccess Enables Exchange 2000 components to communicate with

Active Directory DSAccess uses Lightweight Directory Access Protocol (LDAP) to communicate with Active Directory

! OLE DB Provider for Exchange (ExOLEDB) Acts as the interface between

DAVEx and EXIPC ExOLEDB interacts with the Information Store, and then sends the results back to DAVEx through EXIPC

! Directory Service to the IIS metabase (DS2MB) Provides a one-way

synchronization of configuration information from Active Directory to the IIS metabase

used to process an Outlook

Web Access client request

Lead-in

Outlook Web Access

process client requests

using IIS, Active Directory,

and Exchange 2000

IIS Components

Several IIS components are involved in storing configuration information, transferring messages, and rendering them on a browser

! Metabase IIS stores its configuration information in the metabase

Exchange Setup creates two virtual directories, Exchange and Public, for use by Outlook Web Access The configuration information for virtual directories is stored in the metabase

! W3svc The World Wide Web Publishing Service (W3svc) receives requests

from the clients and performs user authentication

! DAVEx Passes the client request between W3Svc and the Information Store

service DAVEx renders data received from the store, and then passes the data back to the W3Svc to return to the client browser DAVEx is not used

in a front-end/back-end configuration

! ExProx Used in a front-end/back-end configuration only ExProx acts as a

protocol gateway on a front-end server ExProx receives the request from W3svc, and then accesses Active Directory to locate the user’s mailbox server ExProx then passes the request to correct back-end server The back-server passes the data to ExProx, which then sends the data to the W3Svc to return to the client browser

! Forms Registry Stores the Outlook Web Access forms that are rendered by

IIS and are then passed to the client

Client Request Flow

Exchange 2000

IIS

Exchange ISAPI EXIPC

ExProx DAVEx

Active Directory

Authentication

W3Svc

Exchange

2000 Server

The following process describes what happens when a user opens and displays

an e-mail message by using Outlook Web Access This process also applies to other Outlook Web Access functions, such as opening and displaying a folder

1 Client sends a request

A user can gain access to a message from the browser by:

• Clicking on the message in a folder contents view

• Typing the URL to the message into the Address field of the browser

and pressing ENTER

• Selecting an option that points to a message from the list of favorites by

clicking the Favorites menu

When a user requests a message using any of these methods, the client issues a GET request for a URL, which is sent to IIS An example Get request is as follows:

http://server/vroot/user/folder/message.eml

2 IIS receives the request

The W3svc in IIS receives the request and authenticates the user by querying Active Directory Once the user is authenticated, the W3svc then passes the request to the DAVEx

3 Information Store service receives the client request

DAVEx sends the request across the EXIPC to the Information Store service When Information Store service returns the data, the DAVEx renders the form into the appropriate HTML and XML format

Topic Objective

To provide a step-by-step

description of the process of

accessing Exchange data

using an Outlook Web

Access client

Lead-in

The client request flow

starts with the user

requesting information from

4 Client receives the requested information DAVEx sends the request to the W3Svc, which sends the requested information to the client Outlook Web Access renders the HTML based on

a variety of factors, including the browser version Browsers other than Internet Explorer 5 will receive HTML code that conforms to the HTML 3.2 standard Internet Explorer 5 and later browsers receive DHTML code

Client Request Flow Using Front-end/Back-end Servers

Back-End Servers

Back-End Servers

Exchange 2000

IIS

Exchange ISAPI EXIPC

Active Directory

Exchange 2000 supports front-end and back-end configuration for the HTTP protocol, which is helpful for achieving scalability and a unified namespace

In a front-end/back-end configuration, when a user access a mailbox using Outlook Web Access, the browser first connects to the front-end server

Because the server is configured as a front-end, the ExProx processes the request (not DAVEx) ExProx queries Active Directory to determine the back-end server on which the user is located, and then passes the request to the back-end server

Topic Objective

To explain the role of

front-end and back-front-end servers

Lead-in

When a client connect using

Outlook Web Access, the

browser first connects to the

front-end server

Outlook Web Access Directories and Aliases

Exchange 2000 Setup

Exchange 2000 Setup Creates Folders

exchsrvr\binexchsrvr\exchweb\binexchsrvr\exchweb\controlsexchsrvr\exchweb\langexchsrvr\exchweb\img

exchsrvr\binexchsrvr\exchweb\binexchsrvr\exchweb\controlsexchsrvr\exchweb\langexchsrvr\exchweb\img

Exchange 2000 Setup

Exchange 2000 Setup Creates Aliases

exchwebexadminexchangepublic

exchwebexadminexchangepublic

During installation process, Exchange 2000 creates the folders that are relevant

to Outlook Web Access An understanding of the folder locations can help you troubleshoot problems in Outlook Web Access The following table lists these folders

Folder Contains

templates used to render Outlook Web Access

\exchsrvr\exchweb\bin Exwform.dll, which handles form processing

\exchsrvr\exchweb\controls The user interface controls and Java scripts

\exchsrvr\exchweb\lang Localized versions of Help files

\exchsrvr\exchweb\img Graphics used by Outlook Web Access

Exchange 2000 Setup creates four virtual IIS aliases that are used by Outlook Web Access The following table lists the IIS aliases

Alias Function

To list the directories and

aliases created for Outlook

Web Access

Lead-in

It is useful to know the

location of the files and

folders for Outlook Web

Access when

troubleshooting problems

Lab A: Sending E-mail Messages by Using Outlook Web Access

Objectives

After completing this lab, you will be able to:

! Create and send a message in Rich Text Format by using Outlook Web Access

! Create two Outlook Web Access shortcuts: one that enables you to open your mailbox and one that enables you to send messages

Prerequisites

Before working on this lab you must have:

! Knowledge of Windows 2000

! Knowledge of Exchange System Manager

! Knowledge of your Web browser

Lab Setup

To complete this lab, you need:

! To have Microsoft Exchange 2000 installed at D:\Program Files\Exchsrvr into an organization named Northwind Traders Components installed are Microsoft Exchange Messaging and Collaboration Services, Microsoft Exchange System Management Tools, and Microsoft Exchange Instant Messaging Service

! To have a custom MMC in the C:\Documents and Settings\All

Users\Desktop that is saved as your_firstname Console The MMC contains

Topic Objective

To introduce the lab

Lead-in

In this lab, you will send a

rich text formatted message

by using Outlook Web

Access

Explain the lab objectives