FIGURE 12-18 By default, the Protect Container from Accidental Deletion setting is in Visual Studio .NET

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FIGURE 12-18 By default, the Protect Container from Accidental Deletion setting is
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Right now if you right-click an OU and select its properties, the Security tab is hidden from you To view the Security tab, and indeed some more advanced information, in the Active Directory Users and Computers MMC snap-in, enable the Advanced Features view by selecting View, Advanced Features When this is enabled, you see a few extra containers that weren t previously visible, such as LostAndFound, Program Data, System, and NTDS Quotas But the big item is that you see a Security tab for your OU Enabling the Protect Container from Accidental Deletion setting works in two ways well, three if you include not using it at all The rst way is to protect all OUs from accidental deletion This causes a special Access Control Entry (ACE) to be written to the OU for the Everyone group that has explicit deny permissions for Delete and Delete Subtree Remember that a deny always takes precedence over an allow, which means no one can delete the OU If additional OUs are created inside an OU that is protected, those new OUs have the everyone deny rule The parent OU is also updated with an everyone rule denying the capability to delete child OU objects So what does this protection mean If you try to delete a protected OU, you are asked for con rmation and then given an access denied message If you attempt to delete an unprotected OU that has child OUs that are protected, a separate dialog is displayed, as shown in Figure 12-19 As the gure shows, check Use Delete Subtree Server Control, which overrides the protected objects and allows them to be deleted
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FIGURE 12-19 For the deletion of a protected OU to succeed, check Use Delete Subtree
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To delete a protected OU directly and not an unprotected OU with protected child OUs, rst remove the explicit deny ACE via the Security tab of the OU and remove the Everyone entry
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As discussed in 10, one of the major reasons AD in Windows Server 2008 is such a great improvement over previous versions is that you no longer have just domain administrators and then everyone else With AD in Windows Server 2008, you now have granular control over delegation of authority and can give speci c users or groups the ability to manage certain aspects of the directory or part of the directory, such as an OU The most common use of delegation of authority is where you have local IT administrators for an of ce, so an OU is created containing all the users, computers, groups, and resources for that of ce Delegate permission to manage the content of the OU to a local administrators group that contains the local IT administrators It s a good idea to use a group instead of individual users because undoing delegation is not as easy as it should be It s much easier to add/remove people in a group than to run the delegation wizard and try to remove delegated permissions Removing delegated permissions requires a lot of manual effort, however, dsrevoke helps somewhat Say that you delegated permission for an OU and granted the local OU administrators group full permissions over the OU However, more granular delegation is possible Also, if granular permissions were required at the domain level, you perform the same process but select the Delegate Control context menu option at the domain object instead of an OU To delegate permissions for an OU, perform the following steps: 1 Right-click the Organizational Unit to be delegated permissions and select Delegate Control 2 When the welcome screen of the Delegation of Control Wizard is displayed, click Next 3 Select the users or groups to which you re delegating permissions Again, use a group here rather than individual users Create a group for the delegation if one does not exist and click Next, as shown in Figure 12-20
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