Where to find forest functional level

To raise the functional level of a forest, you must be a member of the Enterprise Admins group. The Active Directory Domains and Trusts snap-in is also used to raise the functional level of the forest.

Right click on the root of the snap-in, and select Raise Forest Functional Level. In the next windows, select the required functional forest level, and click the Raise button.

Windows Server supports only mixed mode and native mode. Additionally, it only applies these modes to the domain functionality. The following sections list the Windows Server domain modes because these modes affect how Windows NT 4. There are many considerations when raising the operating system level of the domain controller. These considerations are caused by the storage and replication limitations of the linked attributes in Windows Server modes.

Domains that are upgraded from Windows NT 4. Windows Server domains maintain their current domain functional level when Windows Server domain controllers are upgraded to the Windows Server operating system.

You can raise the domain functional level to either Windows Server native or Windows Server Windows Server Active Directory permits a special forest and domain functional level that is named Windows Server interim. This functional level is provided for upgrades of existing Windows NT 4. Windows Server domain controllers are not supported in this mode. Windows Server interim applies to the following scenarios:. Windows Server interim provides two important enhancements while still permitting replication to Windows NT 4.

Because of the efficiencies in group replication that is activated in the interim level, the interim level is the recommended level for all Windows NT 4. See the "Best Practices" section of this article for more details. Windows Server interim can be activated in three different ways. The first two methods are highly recommended. The third option is less highly recommended because membership in security groups uses a single multi-valued attribute, which may result in replication issues. The ways in which Windows Server interim can be activated are:.

Before you upgrade the Windows NT 4. Child domains inherit the forest-wide functionality settings from the forest they are promoted into. Use the last two options when you join an existing Windows Server forest during an upgrade.

This is a common scenario when an "empty root" domain is in position. The upgraded domain is joined as a child of the empty root and inherits the domain setting from the forest. The following section discusses the best practices for increasing functional levels. The section is broken into two parts.

If the domain controller is not already connected to the appropriate domain, follow these steps to connect to the appropriate domain:. A list of the computers in the domain that are running Windows NT 4. Before you can change the domain functional level to Windows Server , you must physically locate any domain controller in the list, determine the current status of the domain controller, and then either upgrade or remove the domain controller as appropriate.

When you change the domain functional level, replication to the Windows NT 4. However, when you try to increase to Windows Server forest level with domains in Windows Server , the mixed level is blocked. The lack of Windows NT 4. In this example, the environment is raised from Windows Server mixed mode to Windows Server forest mode. For more information, click the following article number to view the article in the Microsoft Knowledge Base: How to remove data in active directory after an unsuccessful domain controller demotion.

To verify that End to End replication is working in the forest, use the Windows Server or newer version of Repadmin against the Windows Server or the Windows Server domain controllers:. This article will go over how to create templates from duplicates of default templates for both User and Machine Authentication.

Depending on the use case that you implement, you will need to duplicate one of the default Certificate templates. Duplication is not required but is strongly recommended to avoid changing the properties of default templates and to better control the changes applied to templates that work with the AEG. This article will walk you through on how to create and link a Group Policy in Active Directory.

Creating a GPO is a fairly simple task, so long as you know what settings you need to change, and how to apply it to the endpoints you are trying to affect.

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