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An Active Directory organizational unit can represent a group of users, such as the marketing department, or a collection of related objects, such as printers You can create a tree structure by nesting organizational units, objects, and containers in the same way that a Windows file system uses folders and files Storing objects in an organizational unit allows an administrator to use Group Policy to apply restrictions to all users or all computers within that unit Objects can still be stored in containers other than organizational units when such container-level policies are not required Global catalog Windows 2000 Server introduced the global catalog, which provides forestwide Active Directory searches Ordinarily, a domain controller stores objects for only one domain.

A global catalog server is a special domain controller that stores complete objects for one domain and partial objects (every object but only a limited set of each object s attributes) for every other domain in the forest The global catalog is also required for user logon There can be multiple global catalog servers in a forest The global catalog makes directory structures within an enterprise transparent to end users seeking information In an enterprise that contains many domains, the global catalog allows clients to easily perform searches across all domains without having to search each domain separately Administration tools Administrators who have the required permissions can use the Windows Server 2003 Administration Tools Pack to remotely create Active Directory objects and perform other administration tasks from a Windows XP Professional client that meets the following criteria:.

The Windows Server 2003 Administration Tools Pack has been installed locally. The Windows XP Professional Client has been updated to at least Service Pack 1 or has the software update described in Knowledge Base article 329357 applied. The Windows XP Professional client is a 32-bit client. The tools support 32-bit and 64-bit server operating systems. However, the Windows Server 2003 Administration Tools Pack does not install on 64-bit systems.

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Part IV:

You must have administrative permissions on the local computer to install or run Windows Server 2003 Administration Tools Pack. For security reasons, Windows Server 2003 Administration Tools Pack should be uninstalled if the Windows XP Professional computer is to be used by a non-administrator. In addition, you should be aware of specific security requirements for each tool. Note also that the default configuration for Windows Firewall on computers running Windows XP Service Pack 2 prevents certain Windows 2000 and Windows Server 2003 administrative tools from remotely managing these computers. (See article 840634, You receive an Access denied or The network path was not found error message when you try to remotely manage a computer that is running Windows XP Service Pack 2, in the Microsoft Knowledge Base at http://support.microsoft.com for more information.

The Administration Tools Pack is available as adminpakmsi on the Windows Server 2003 family operating system CDs or from the Microsoft Download Center at http://wwwmicrosoftcom /downloads (by searching for administration tools ) For more information about installing the Administration Tools Pack, see the Windows Server 2003 Help and Support Center Active Directory security A security identifier (SID) is a unique number created by the security subsystem of the Windows XP Professional, Windows 2000, Windows Server 2003, or Windows NT operating system, and it s assigned to security principal objects such as user, group, and computer accounts Every account on a network is issued a unique SID when that account is first created For example, when you join a computer to a Windows 2000 or Windows Server 2003 domain, a SID is created for that computer account.

preceding simple example because the addresses must be translated to binary and dealt with in that format. However, for the most common subnetting schemes, simply masking in between the dotted-decimal values is sufficient.

Internal processes in the Windows XP Professional, Windows 2000, Windows Server 2003, and Windows NT operating systems refer to an account by its SID instead of its user name or group name Each object is protected by an access control list (ACL) that contains access control entries (ACEs) that specify the users or groups who are permitted access to that object and what these access rights are An ACE is created for an object by assigning permissions Each ACE contains the SID of a user or group who is allowed (or explicitly denied) access to that object An ACE also defines the level of access allowed For example, a user might have read-only access to some objects, read-and-write access to other objects, and no access to the remaining objects.