81 For detailed steps about how to create an answer file for running unattended setup, see How to Create an Answer File for Running Unattended Exchange Setup. For detailed steps about how to use an answer file to run unattended setup, see How to Use an Answer File for Unattended Exchange Setup. Note: If Autologon is enabled on the server where the unattend answer file is created, the password of the user creating the answer file is stored in plain text in the answer file. Disable Autologon before using the /createunattend switch. For information about how to enable and disable Autologon, see Microsoft Knowledge Base article 234562, "How to Enable Automatic Logon in Windows 2000 Professional" (http://go.microsoft.com/fwlink/?linkid=3052&kbid=234562). After starting unattended setup, Exchange Server 2003 is installed on your server automatically without any user interaction. To verify that your Exchange installation is successful, see Post-Installation Steps for Exchange Server 2003. 82 When Unattended Setup Can Be Run You can run unattended setup for the following procedures: Installing the second to nth Exchange Server 2003 server in your organization Installing Exchange Server 2003 System Management Tools Running DomainPrep When Unattended Setup Cannot Be Run You cannot run unattended setup for the following procedures: Installing the first Exchange Server 2003 server in your organization Installing Exchange Server 2003 in a Windows cluster Installing Exchange Server 2003 in a mixed-mode environment (for example, Exchange Server 5.5 and Exchange Server 2003) 83 Performing any maintenance tasks (for example, adding or removing programs, re-installing Exchange, or upgrading from Exchange 2000 Server) Switching from Mixed Mode to Native Mode By default, when you complete your installation of Exchange Server 2003 into your organization, Exchange Server 2003 is running in mixed mode. If your Exchange Server 2003 servers have to coexist with Exchange Server 5.5 in the future, your organization must run in mixed mode. An Exchange mixed-mode organization uses Site Replication Service to ensure future interoperability and communication between Exchange Server 2003 servers and Exchange Server 5.5. Running in mixed mode limits the functionality of Exchange Server 2003. Therefore, it is recommended that you switch from mixed mode to native mode. This section discusses the advantages of a native-mode Exchange organization and provides the steps to switch from mixed mode to native mode. You are ready to change your Exchange Server 2003 organization to native mode if your organization will never require interoperability between your Exchange Server 2003 servers and Exchange Server 5.5 servers in the same organization. 84 Note: After you switch your Exchange Server 2003 organization from mixed mode to native mode, you cannot switch the organization back to mixed mode. Make sure that your Exchange Server 2003 organization will not have to interoperate with Exchange Server 5.5 in the future before you switch from mixed mode to native mode. Advantages of Running Exchange in Native Mode Because many Exchange Server 2003 features are available only when you run your Exchange Server 2003 organization in native mode, it is recommended that you switch from mixed mode to native mode. Running Exchange Server 2003 in native mode has the following advantages: You can create query-based distribution groups. A query-based distribution group provides the same functionality as a standard distribution group. However, instead of specifying static user memberships, with a query-based distribution group you can use an LDAP query to build membership in the distribution group dynamically. For more information about query-based distribution groups, see "Managing Recipients and Recipient Policies" in the Exchange Server 85 2003 Administration Guide (http://go.microsoft.com/fwlink/?LinkId=47617). Your routing bridgehead server pairs use 8BITMIME data transfers instead of converting to 7-bit. This difference equates to a considerable bandwidth saving over routing group connectors. Routing groups can consist of servers from multiple administrative groups. You can move Exchange Server 2003 servers between routing groups. You can move mailboxes between administrative groups. Simple Mail Transfer Protocol (SMTP) is the default routing protocol. Switching to Native Mode For detailed steps about how to switch your Exchange organization from mixed mode to native mode, see How to Convert from Mixed Mode to Native Mode in Exchange. 86 Important: After you switch your Exchange Server 2003 organization from mixed mode to native mode, you cannot switch the organization back to mixed mode. Before you switch from mixed mode to native mode, ensure that your Exchange Server 2003 organization will not have to interoperate with Exchange Server 5.5 in the future. To take full advantage of Exchange native mode, you must restart the Microsoft Exchange Information Store service on all of the Exchange servers in your organization. You do not need to restart all of the Microsoft Exchange Information Store services simultaneously, but you must restart the service on each server for the server to take advantage of all Exchange native mode features. Restart the Microsoft Exchange Information Store service on your Exchange servers after the change to native mode has been replicated to your local Windows domain controller. For detailed steps, see How to Restart the Microsoft Exchange Information Store Service. Uninstalling Exchange Server 2003 After ensuring that your organization meets certain prerequisites, you can run Exchange Setup to uninstall Exchange Server 2003. For detailed steps, see How to Uninstall Exchange Server 2003. 87 How to Download the Latest Deployment Tools for Exchange Server 2003 This topic explains how to download the latest Exchange Server 2003 Deployment Tools. The Exchange Server 2003 Deployment Tools are required to make sure you are prepared to run Exchange 2003 Setup. The Exchange Server Deployment Tools are updated periodically. It is recommended that you always use the latest version of the tools. Procedure To download the latest Exchange Server 2003 Deployment tools 1. On the server on which you will install Exchange 2003, go to the Downloads for Exchange 2003 Web site (http://go.microsoft.com/fwlink/?linkid=25097). 2. Under the Tools section, select Tools for Exchange Server 2003. 3. Under Tools, click Deployment Tools. 4. Select your language and then click Download. 88 5. When prompted, select Open and then select a local location to save the deployment tools. 6. To run the Exchange Server Deployment Tools, navigate to your local copy of the deployment tools and then double click exdeploy.hta. Note: .hta files are hidden files. Therefore, be sure to enable the Show hidden files and folders option in Windows Explorer. For More Information For information about how to start the Exchange Server Deployment Tools from a download or from the Exchange Server CD, see How to Start the Exchange Server Deployment Tools. How to Start the Exchange Server Deployment Tools This topic explains how to start the Exchange Server 2003 deployment tools. The deployment tools are presented as a series of three checklists that help you prepare to deploy Exchange Server 2003 in your organization. 89 Before You Begin Before you begin to use the Exchange Server 2003 Deployment tools it is recommended that you download the latest deployment tools. For detailed instructions, see How to Download the Latest Deployment Tools for Exchange Server 2003. When running the Exchange Server Deployment Tools, be sure to read each option carefully. Make sure the option you are selecting correctly corresponds to your current environment. If your security settings in Internet Explorer are too restrictive, the Exchange Server Deployment Tools will not function correctly. If you are having difficulty using the Exchange Server Deployment Tools, try lowering your security settings in Internet Explorer. Procedures To start the Microsoft Exchange Server 2003 Deployment Tools from a download 1. Download the deployment tools and save them locally. 90 2. Navigate to the local copy of the deployment tools. 3. Double click exdeploy.hta. Note: .hta files are hidden. Therefore, be sure to enable the Show hidden files and folders option in Windows Explorer. 4. Follow the step-by-step instructions in the Exchange Server Deployment Tools. To start the Microsoft Exchange Server 2003 Deployment Tools from the CD 1. Insert the Exchange Server 2003 CD into your CD-ROM drive. 2. On the Welcome to Exchange Server 2003 Setup page, click Exchange Deployment Tools. 3. If the Welcome to Exchange Server 2003 Setup page does not appear after you insert your CD, double-click Setup.exe, and then . the latest Exchange Server 2003 Deployment Tools. The Exchange Server 2003 Deployment Tools are required to make sure you are prepared to run Exchange 2003 Setup. The Exchange Server Deployment. installation of Exchange Server 2003 into your organization, Exchange Server 2003 is running in mixed mode. If your Exchange Server 2003 servers have to coexist with Exchange Server 5.5 in the. first Exchange Server 2003 server in your organization Installing Exchange Server 2003 in a Windows cluster Installing Exchange Server 2003 in a mixed-mode environment (for example, Exchange