GPMC is a Microsoft Management Console (MMC) snap-in used by administrators to centrally create, manage, and deploy GPOs in Active Directory.
The Group Policy Management Console (GPMC) is an essential administrative tool that Windows admins can use to centrally configure and manage Group Policy Objects (GPOs).
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GPMC is a Microsoft Management Console (MMC) snap-in used by administrators to centrally create, manage, and deploy GPOs in Active Directory.
There are several different options for accessing the Group Policy Management Console or the Group Policy Editor.
The easiest way to access the GPMC is to log onto Windows Server.
Server Manager’s Tools menu also contains a Local Security Policy option.

Another option is to use the Start button on the Windows taskbar.
The GPMC.msc command can also be used from within PowerShell.
As previously noted, Microsoft operating systems also include a local security policy that is separate from the Active Directory level policy. To access a machine’s local security policy, you can do so by using the GPEdit command.

The Group Policy management tools leverage the Microsoft Management Console (MMC).

Although desktop operating systems, such as Windows 10 and Windows 11, do include a local security policy, workstations do not normally offer the ability to manage AD GPOs. Fortunately, it is possible to install GPMC as an optional feature.
In Windows 11:

Microsoft gives admins the ability to control who can create a new GPO or delete or edit an existing GPO through the Delegation Wizard. This means that IT teams can delegate control without needing to make an administrator a full domain admin. Delegation can be configured at the domain level, the Organizational Unit (OU) level, or for individual existing GPOs.
To delegate control:
Figure 5

Group Policy is hierarchical in nature, and the effective policy can be made up of multiple GPOs. Not surprisingly, Microsoft allows you to create new GPOs at various levels of the hierarchy.
To create a new GPO:

Before you will be able to use the newly created GPO, you will need to create a GPO link. The GPO link determines the level of the hierarchy where the GPO will apply. The link can apply the GPO at the Sites, Domains, or Organizational Units level of the hierarchy.
Link a GPO:
The Windows operating system uses Group Policy as a means of centrally applying various settings to Windows computers. These settings can be related to the operating system’s basic configuration, security, or even the end user’s configuration.
In an Active Directory (AD) environment, GPOs are applied to domain-joined systems. It is worth noting however, that Windows Server and desktop Windows operating systems, such as Windows 10 and Windows 11, include a local security policy.
The local security policy can also be managed using GPMC and it is designed to keep the computer secure when it is not joined to AD.
GPOs allow administrators to enforce various policy settings related to security, compliance, and even preference. Perhaps the best known use of GPOs is that they can be used to enforce password policies and account lockout policies. However, such functionality is really just the tip of the iceberg.
GPOs can also be used to manage Windows Defender Firewall settings, software deployment, application management, Windows Update, desktop restrictions, Windows environment settings, network security, and even authentication rules.
Because multiple GPOs can come together to form the overall Group Policy, it is possible for conflicts to occur. For example, two GPOs might include contradictory settings. These types of problems can be avoided by using Group Policy modeling to simulate how the various policy settings will be applied before you actually deploy the GPOs.
Group Policy modeling is useful when testing a new GPO, particularly when you are concerned about inheritance conflicts. It can also be useful for verifying security filtering or Windows Management Instrumentation (WMI) filtering.
To use Group Policy modeling:

Group Policy modeling is a simulation. It shows you what would happen in a particular situation. However, there is another tool called Resultant Set of Policy (RSOP) that does almost exactly the same thing. The difference is that RSOP is based in reality, not simulation. Its job is to show you what is actually happening and why.
RSOP works in almost exactly the same way as Group Policy modeling. Rather than right clicking on the Group Policy Modeling container and launching the Group Modeling Wizard however, you must instead right click on the Group Policy Results container and select the Group Policy Results Wizard option.
You can open the Group Policy Management Console by typing gpmc.msc into the Run dialog, Command Prompt, or Start menu. The console opens if Group Policy Management or RSAT is installed on the system.
In Group Policy Management, expand your domain and select Group Policy Objects to see all GPOs. You can also use the Search feature to locate a GPO by name.
You can view Group Policy Objects from the command line using PowerShell cmdlets such as Get-GPO or Get-GPResultantSetOfPolicy. These commands display applied or existing GPO information without opening the GUI.
In Windows 11, install RSAT: Group Policy Management Tools from Optional Features, then run gpmc.msc. GPMC is only available on Pro, Enterprise, and Education editions.