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  • 1. Upgrading Active Directory Domains to Windows Server 2008 and Windows Server 2008 R2 AD DS Domains Microsoft Corporation Published: November 2009 Writer: Justin Hall Editor: Jim Becker Abstract This guide explains the process for upgrading Active Directory domains to Windows Server 2008 and Windows Server 2008 R2, how to upgrade the operating system of domain controllers, and how to add domain controllers that run Windows Server 2008 or Windows Server 2008 R2 to an existing domain.

2. Copyright Information This document supports a preliminary release of a software product that may be changed substantially prior to final commercial release, and is the confidential and proprietary information of Microsoft Corporation. It is disclosed pursuant to a non-disclosure agreement between the recipient and Microsoft. This document is provided for informational purposes only and Microsoft makes no warranties, either express or implied, in this document. Information in this document, including URL and other Internet Web site references, is subject to change without notice. The entire risk of the use or the results from the use of this document remains with the user. Unless otherwise noted, the example companies, organizations, products, domain names, e-mail addresses, logos, people, places, and events depicted herein are fictitious, and no association with any real company, organization, product, domain name, e-mail address, logo, person, place, or event is intended or should be inferred. Complying with all applicable copyright laws is the responsibility of the user. Without limiting the rights under copyright, no part of this document may be reproduced, stored in or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise), or for any purpose, without the express written permission of Microsoft Corporation. Microsoft may have patents, patent applications, trademarks, copyrights, or other intellectual property rights covering subject matter in this document. Except as expressly provided in any written license agreement from Microsoft, the furnishing of this document does not give you any license to these patents, trademarks, copyrights, or other intellectual property. 2009 Microsoft Corporation. All rights reserved. Active Directory, Microsoft, Windows, and Windows Server are either registered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. All other trademarks are property of their respective owners. 3. Contents Upgrading Active Directory Domains to Windows Server 2008 and Windows Server 2008 R2 AD DS Domains................................................................................................................................1 Abstract....................................................................................................................................1 Copyright Information......................................................................................................................2 Contents.......................................................................................................................................... 3 Upgrading Active Directory Domains to Windows Server 2008 and Windows Server 2008 R2 AD DS Domains................................................................................................................................7 About this guide...........................................................................................................................7 In this guide.................................................................................................................................7 Related information......................................................................................................................7 Overview of Upgrading Active Directory Domains...........................................................................8 Planning to Upgrade Active Directory Domains..............................................................................8 In this guide.................................................................................................................................8 Checklist: Preupgrade Tasks...........................................................................................................9 Assign Appropriate Credentials.....................................................................................................10 Introduce a Member Server That Runs Windows Server 2008 or Windows Server 2008 R2......12 Determine Supported Software Upgrades....................................................................................13 Assess Hardware Requirements...................................................................................................15 Disk space requirements for upgrading to Windows Server 2008.............................................16 Disk space requirements for upgrading to Windows Server 2008 R2........................................17 Determine Domain Controller Upgrade Order...............................................................................20 Develop a Test Plan for Your Domain Upgrade Process...............................................................21 Determine Service Pack Levels....................................................................................................22 Back Up Domain Data...................................................................................................................24 Resolve Upgrade and Application Compatibility Problems............................................................24 Known issues for upgrading to Windows Server 2003...............................................................24 Performing the Upgrade of Active Directory Domains...................................................................26 In this guide...............................................................................................................................26 4. Checklist: Upgrade Tasks..............................................................................................................26 Prepare Your Infrastructure for Upgrade.......................................................................................27 Install Active Directory Domain Services on the Member Server That Runs Windows Server 2008 or Windows Server 2008 R2......................................................................................................28 Upgrade Existing Domain Controllers...........................................................................................30 Unattended upgrade .................................................................................................................31 Modify Default Security Policies....................................................................................................35 Update Group Policy Permissions................................................................................................38 Perform Clean-up Tasks................................................................................................................39 Completing the Upgrade of Active Directory Domains..................................................................39 In this guide...............................................................................................................................39 Checklist: Post-Upgrade Tasks.....................................................................................................40 Raise the Functional Levels of Domains and Forests...................................................................41 Move DNS Data into DNS Application Directory Partitions...........................................................42 Redirect Users and Computers.....................................................................................................43 Complete the Upgrade..................................................................................................................45 Finding Additional Information About Upgrading Active Directory Domains..................................45 Appendix A: Background Information for Upgrading Active Directory Domains............................46 Active Directory preparation tool................................................................................................47 Application directory partitions for DNS.....................................................................................47 Service (SRV) resource records.............................................................................................48 _msdcs.domain_name subdomain.........................................................................................48 _msdcs.forest_root_domain subdomain.................................................................................48 Intrasite replication frequency.................................................................................................49 New groups and new group memberships that are created after upgrading the PDC...............50 Security policy considerations when upgrading from Windows 2000 to Windows Server 2003.52 SMB packet signing................................................................................................................52 Secure channel signing and encryption..................................................................................52 Microsoft Support Quick Start for Adding Windows Server 2008 or Windows Server 2008 R2 Domain Controllers to Existing Domains...................................................................................53 Whats new in AD DS in Windows Server 2008 and Windows Server 2008 R2........................54 System requirements for installing Windows Server 2008 and Windows Server 2008

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