A component that can be loaded into the Microsoft Management Console (MMC) to provide a specific management capability in Microsoft Windows 2000 or in a Microsoft BackOffice server application.
Many snap-ins are available for administering computers running Windows 2000; these include third-party snap-ins for managing installable third-party applications and services. The following table shows some of the snap-ins that come with Windows 2000.
Not all of them appear in the administrative tools program group that you access from the Start menu.
| Snap-In | Function |
| Active Directory Users and Computers | Configuring Active Directory, organizing a domain, creating user and group accounts, and configuring security for networking components |
| Active Directory Schema | Modifying the schema |
| Active Directory Sites and Services | Creating and managing sites |
| Active Directory Domains and Trusts | Administering a domain within a domain tree |
| Admission Control Services Manager | Configuring Admission Control Services |
| Certificate Manager | Managing digital certificates and keys |
| Computer Management | Managing a computer and creating access to other useful snap-ins such as Disk Management and Event Viewer |
| Device Manager | Managing resources used by system devices |
| DHCP Manager | Creating and configuring Dynamic Host Configuration Protocol (DHCP) servers |
| Disk Defragmenter | Defragmenting disks |
| Disk Management | Configuring disks and volumes |
| DFS Manager | Configuring the Distributed file system (Dfs) for centralized management of network resources |
| DNS Manager | Creating and configuring Domain Name System (DNS) servers |
| Event Viewer | Viewing system, application, security, and other logs on local and remote computers |
| File Service Management | Creating shares on local and remote computers and monitoring and configuring network connections |
| Group Policy Editor | Creating group policy objects (GPOs) for configuring groups of computers centrally |
| Index Manager | Configuring indexing of directories |
| Internet Authentication Service | Configuring Internet Authentication Service (IAS) service and clients |
| Internet Information Services (IIS) | Creating and configuring World Wide Web (WWW) and File Transfer Protocol (FTP) sites |
| IP Security Policy Management | Configuring Internet Protocol Security (IPSec) |
| Local User Manager | Managing user accounts in a workgroup |
| Microsoft System Information | Viewing system component details |
| Microsoft Transaction Server | Configuring Microsoft Transaction Server (MTS) |
| Network Management | Managing network services and policies |
| Removable Storage Management | Managing removable storage devices |
| Routing and Remote Access Management | Configuring Routing and Remote Access Service (RRAS) |
| Security Configuration Editor | Creating and modifying security policies |
| Security Configuration Manager | Managing security policies |
| System Monitor Log Manager | Managing System Monitor logs |
| System Service Management | Monitoring, starting, and stopping services |
| Telephony Manager | Managing Telephony API (TAPI) applications |
Snap-ins come in two types: