Windows PowerShell History Viewer. To help ensure consistent and predictable restart behavior for all devices and computers in your enterprise, including those that run Windows 8 and Windows Server , you can configure the following Group Policy settings:.
The following table lists some examples of how to configure these settings to provide desired restart behavior. Registry key: Enable the registry key discussed in Microsoft KB article Set Regular maintenance random delay to PT6H for 6-hour random delay to provide the following behavior:. For more information about why the Windows engineering team implemented these changes, see Minimizing restarts after automatic updating in Windows Update.
Error conditions can be corrected to eliminate concerns from a partially complete upgrade. The wizard also exports a Windows PowerShell script that contains all the options that were specified during the graphical installation. Taken together, the AD DS installation changes simplify the DC role installation process and reduce the likelihood of administrative errors, especially when you are deploying multiple domain controllers across global regions and domains.
For administrators that want to control the introduction of schema changes in an Active Directory forest independent of the installation of Windows Server DCs in an existing forest, Adprep. There is only one version of Adprep. It can be run remotely, and must be run remotely if that targeted operations master role is hosted on a bit operating system or Windows Server Dcpromo is deprecated although in Windows Server only it can still be run with an answer file or command line parameters to give organizations time to transition existing automation to the new Windows PowerShell installation options.
Beginning with Windows Server , domain controllers also have the following secure default settings, compared to domain controllers that run Windows Server or Windows Third-party Server Message Block SMB clients may be incompatible with the secure default settings on domain controllers.
In all cases, these settings can be relaxed to allow interoperability, but only at the expense of security. The minimum system requirements for Windows Server are listed in the following table. For more information about system requirements and pre-installation information, see Installing Windows Server There are no additional system requirements to install a new Active Directory forest, but you should add sufficient memory to cache the contents of Active Directory database in order to improve performance for domain controllers, LDAP client requests, and Active Directory-enabled applications.
If you are upgrading an existing domain controller or adding a new domain controller to an existing forest, review the next section to ensure the server meets disk space requirements. This section covers disk space requirements only for upgrading domain controllers from Windows Server or Windows Server R2.
For more information about disk space requirements for upgrading domain controllers to earlier versions of Windows Server, see Disk space requirements for upgrading to Windows Server or Disk space requirements for upgrading to Windows Server R2.
Size the disk that hosts the Active Directory database and log files in order to accommodate the custom and application-driven schema extensions, application and administrator-initiated indexes, plus space for the objects and attributes that you will be added to the directory over deployment life of the domain controller typically 5 to 8 years. Right sizing at deployment time is typically a good investment compared to greater touch costs required to expand disk storage after deployment.
On domain controllers that you plan to upgrade, make sure that the drive that hosts the Active Directory database NTDS. DIT file before you begin the operating system upgrade. If there is insufficient free disk space on the volume, the upgrade can fail and the upgrade compatibility report returns an error indicating insufficient free disk space:. In this case, you can try an offline defragmentation of the Active Directory database to recapture additional space, and then retry the upgrade.
In previous releases, Windows Server editions differed in their support of server roles, processor counts and large memory support. The Standard and Datacenter editions of Windows Server support all features and underlying hardware but vary in their virtualization rights — two virtual instances are allowed for Standard edition and unlimited virtual instances are allowed for Datacenter edition.
The following Windows client and Windows Server operating systems are supported for domain member computers with domain controllers that run Windows Server or later:. Computers that run Windows 8. In this case however, some Windows 8 features may require additional configuration or may not be available. For more information about those features and other recommendations for managing Windows 8 clients in downlevel domains, see Running Windows 8 member computers in Windows Server domains.
You cannot upgrade domain controllers that run Windows Server or bit versions of Windows Server To replace them, install domain controllers that run a later version of Windows Server in the domain, and then remove the domain controllers that Windows Server For more information about supported upgrade paths, see Evaluation Versions and Upgrade Options for Windows Server Note that you cannot convert a domain controller that runs an evaluation version of Windows Server directly to a retail version.
Instead, install an additional domain controller on a server that runs a retail version and remove AD DS from the domain controller that runs on the evaluation version. Due to a known issue, you cannot upgrade a domain controller that runs a Server Core installation of Windows Server R2 to a Server Core installation of Windows Server The upgrade will hang on a solid black screen late in the upgrade process. Rebooting such DCs exposes an option in boot. An additional reboot triggers the automatic rollback to the previous operating system version.
Until a solution is available, it is recommended that you install a new domain controller running a Server Core installation of Windows Server instead of in-place upgrading an existing domain controller that runs a Server Core installation of Windows Server R2.
For more information, see KB article Windows Server requires a Windows Server forest functional level. That is, before you can add a domain controller that runs Windows Server to an existing Active Directory forest, the forest functional level must be Windows Server or higher. This means that domain controllers that run Windows Server R2, Windows Server , or Windows Server can operate in the same forest, but domain controllers that run Windows Server are not supported and will block installation of a domain controller that runs Windows Server If the forest contains domain controllers running Windows Server or later but the forest functional level is still Windows , the installation is also blocked.
Windows domain controllers must be removed prior to adding Windows Server domain controllers to your forest. In this case, consider the following workflow:. Install domain controllers that run Windows Server or later. These domain controllers can be deployed on an evaluation version of Windows Server.
This step also requires running adprep. Remove the Windows domain controllers. Specifically, gracefully demote or forcibly remove Windows Server domain controllers from the domain and used Active Directory Users and Computers to remove the domain controller accounts for all removed domain controllers.
The new Windows Server domain functional level enables one new feature: the KDC support for claims, compound authentication, and Kerberos armoring KDC administrative template policy has two settings Always provide claims and Fail unarmored authentication requests that require Windows Server domain functional level.
For more information, see Support for claims, compound authentication, and Kerberos armoring. The Windows Server forest functional level does not provide any new features, but it ensures that any new domain created in the forest will automatically operate at the Windows Server domain functional level. The Windows Server domain functional level does not provide other new features beyond KDC support for claims, compound authentication, and Kerberos armoring. But it ensures that any domain controller in the domain runs Windows Server Der neue Forest wird installiert und der erste Domain-Controller ist konfiguriert.
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Email Address:. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Use the articles in this section to learn how to install and deploy Windows Server R2 and Windows Server Did you know that Microsoft Azure provides similar functionality in the cloud?
Learn more about Microsoft Azure virtualization solutions. Related updates have also been released for Windows 8. System Requirements and Installation Information for Windows Server R2 This document provides information about installing the Windows Server R2 operating system, including important steps to take prior to installation, supported upgrade paths for the release, and information about installing versions distributed as virtual hard disk VHD files.
Upgrade Options for Windows Server R2 This document summarizes key information about the supported upgrade paths from previously licensed retail versions of Windows Server to Windows Server R2. This topic helps you find and open common management tools, create shortcuts to frequently used programs, run programs with elevated privileges, and perform common tasks such signing in and out, restarting, and shutting down computers that are running Windows Server R2 and Windows Server
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