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Microsoft
®
Windows Server
™
2003 White Paper
Windows NT 4.0 Server Upgrade Guide 53
Upgrading a Windows NT Domain to Active Directory
After the high-level planning phase, it is time to start implementing the plan. The upgrade process
involves the following steps:
• Plan and implement a namespace and DNS infrastructure.
• Determine forest functionality.
• Upgrade the server running Windows NT Server 4.0 or earlier PDC.
• Upgrade any remaining BDCs.
• Convert groups.
• Complete the upgrade of the domain.
Planning and Implementing a Namespace and DNS Infrastructure
Namespace refers to the naming convention that defines a set of unique names for resources in a
network, such as DNS, a hierarchical naming structure that identifies each network resource and
its place in the hierarchy of the namespace, and WINS, a flat naming structure that identifies each
network resource using a single, unique name.
DNS is required for Active Directory. DNS is a hierarchical, distributed database that contains
mappings of DNS domain names to various types of data, such as IP addresses. DNS enables
the location of computers and services by user-friendly names, and it also enables the discovery
of other information stored in the database.
When setting up a namespace, it is recommended that you first choose and register a unique
parent DNS domain name that can be used for hosting your organization on the Internet, for
example, Microsoft.com. Once you have chosen your parent domain name, you can combine this
name with a location or organizational name used in your organization to form other subdomain
names. For example, a subdomain can be added for resources used by the information
technology group at your organization, called itg.example.microsoft.com domain tree. Additional
subdomain names can then be formed using this name, such as edi.itg.example.microsoft.com, a
subdomain for a group of programmers working on electronic data interchange (EDI) in this
division. Likewise, another group of workers providing support in this division might use
support.itg.example.microsoft.com.
Before beginning the upgrade from Windows NT Server 4.0 to the Windows Server 2003 Active
Directory service, ensure that you have designed a DNS and Active Directory namespace and
have either configured DNS servers or are planning to have the Active Directory Installation
Wizard automatically install the DNS service on the domain controller.
Active Directory and DNS Integration
Active Directory is integrated with DNS in the following ways:
• Active Directory and DNS have the same hierarchical structure. Although separate and
implemented differently for different purposes, an organization's namespace for DNS and Active
Directory have an identical structure. For example, microsoft.com is both a DNS domain and an
Active Directory domain.
- Contents 3
- Introduction 7
- Why Upgrade? 8
- Top 10 Reasons to Upgrade 9
- Microsoft 10
- Windows Server 10
- 2003 White Paper 10
- Preparing to Upgrade 13
- Upgrading with Exchange 2000 14
- Hardware Considerations 14
- Server Upgrade Checklists 20
- Planning the Upgrade Phase 21
- About ACT 3.0 24
- Installing ACT 3.0 24
- Using Analyzer 1.0 28
- What’s Next? 34
- Sample Product Activation 48
- Benefits of Active Directory 50
- Server 2003 54
- 10.Click Change 61
- HGFPROPERTIES-Single 69
- Domain Model 69
- CurrentComputerName 78
- NewComputerName 78
- Results of the Upgrade 80
- Sample Upgrade Review 82
- Windows Services 86
- Service Security Contexts 89
- IIS 6.0 Security Changes 97
- Network Security 108
- NetBEUI 110
- Data Link Control (DLC) 110
- Streams 111
- IIS 6.0 Manageability 114
- IIS 6.0 Security 114
- Isolation Modes 116
- IIS is disabled by default 117
- Applications After Upgrade 123
- ISAPI Extension Settings 124
- ISAPI Filters Removed 125
- Exchange Server 127
- COM+ 1.5 135
- in the COM+ Software 136
- Appendix C: Related Links 155
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