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Lesson Summary
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There are two types of groups: security and distribution. Security groups can be assigned permissions, while distribution groups are used for query containers, such as e-mail distribution groups, and cannot be assigned permissions to a resource. Security permissions for a group are assigned in an ACL just as any other security principal, such as a user or computer. In Windows 2000 native or Windows Server 2003 domain functional level, groups of both security and distribution type can be constructed as domain local, global, or universal, each with a different scope as to which security principals they can contain.
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Lesson 2
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Managing Group Accounts
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Lesson 2: Managing Group Accounts
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The Active Directory Users And Computers MMC is the primary tool you will use to administer security principals users, groups, and computers in the domain. In the creation of groups, you will configure the scope, type, and membership for each. You will also use the Active Directory Users And Computers MMC to modify membership of existing groups.
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After this lesson, you will be able to
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Create a group Modify the membership of a group Find the domain groups to which a user belongs
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Estimated lesson time: 10 minutes
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Creating a Security Group
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The tool that you will use most often in the creation of groups is the Active Directory Users And Computers MMC, which can be found in the Administrative Tools folder. From within the Active Directory Users And Computers MMC, right-click the details pane of the container within which you want to create the group, and choose New, Group. You then must select the type and scope of group that you want to create. The primary type of group that you will likely create is a security group because this is the type of group used to set permissions in an ACL. In a mixed or interim domain functional level domain, you can only set a security group for the domain local and global scopes. As Figure 4-1 illustrates, you cannot create a security group that has uni versal scope in mixed or interim domain functional level domains.
Figure 4-1
Security groups in mixed or interim functional level domains
4-10
4
Group Accounts
Domain local, global, and universal groups can, however, be created as a distribution type in a mixed or interim domain functional level domain. In a mixed or interim domain functional level domain, security groups can be created in any scope.
Modifying Group Membership
Adding or deleting members from a group is also accomplished through Active Direc tory Users And Computers. Right-click any group, and choose Properties. Figure 4-2 illustrates the Properties dialog box of a global security group called Sales.
Figure 4-2 Properties page of the Sales security group
Table 4-3 explains the member configuration tabs of the Properties dialog box.
Table 4-3
Membership Configuration
Function Adding, removing, or listing the security principals that this container holds as members Adding, removing, or listing the containers that hold this container as a member
Tab Members Member Of
See Also
See 3, User Accounts, for additional information on using Directory Service command-line tools for viewing and modifying group membership. These tools include DSQUERY, DSGET, DSMOD, and DSGROUP DSGET is particularly useful for listing all group . memberships for a user.
Lesson 2
Managing Group Accounts
4-11
Finding the Domain Groups to Which a User Belongs
Active Directory allows for flexible and creative group nesting, where
Global groups can nest into other global groups, universal groups, or domain local groups. Universal groups can be members of other universal groups or domain local groups. Domain local groups can belong to other domain local groups.
This flexibility brings with it the potential for complexity, and without the right tools, it would be difficult to know exactly which groups a user belongs to, whether directly or indirectly. Fortunately, Windows Server 2003 adds the DSGET command, which solves the problem. From a command prompt, type:
dsget user UserDN -memberof [-expand]
The -memberof switch returns the value of the MemberOf attribute, showing the groups to which the user directly belongs. By adding the -expand switch, those groups are searched recursively, producing an exhaustive list of all groups to which the user belongs in the domain.
Practice: Modifying Group Membership
In this practice, you will work with group memberships and nesting to identify which combinations of group memberships are possible.
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