Before you can raise domain and forest functional levels, you have to evaluate your current environment and identify the functional level requirement that best meets the needs of your organization. Assess your current environment by identifying the domains in your forest, the domain controllers that are located in each domain, the operating system and service packs that each domain controller is running, and the date that you plan to upgrade the domain controllers.
If you plan to retire a domain controller, make sure that you understand the full impact that doing so will have on your environment. The following circumstances might prevent you from upgrading an earlier version of the Windows Server operating system to the Windows Server or Windows Server R2 functional level:.
A domain controller running an antivirus program that is incompatible with Windows Server or Windows Server R2. Use of a version-specific program that does not run on Windows Server or Windows Server R2. Documenting this information can help you identify the steps to take to ensure that you have a fully functional Windows Server or Windows Server R2 environment.
After you assess your current environment, you have to identify the functional level upgrade that applies to your organization. These options are available:. In a Windows native environment that consists only of Windows based domain controllers, the functional levels are set by default to the following levels, and they remain at these levels until you raise them manually:. To use all the forest-level and domain-level features in Windows Server or Windows Server R2 , you have to upgrade this Windows environment to Windows Server or Windows Server R2.
You can perform this upgrade in either of the following ways:. Introduce newly installed Windows Server -based or Windows Server R2 -based domain controllers into the forest, and then retire all domain controllers running Windows Perform an in-place upgrade of all existing domain controllers running Windows in the forest to domain controllers running Windows Server Then, perform an in-place upgrade of those domain controllers to Windows Server or Windows Server R2.
Windows Server R2 is an xbased operating system. If your server is running an xbased version of Windows Server , you can successfully perform an in-place upgrade of this computer's operating system to Windows Server R2.
If your server is running an xbased version of Windows Server , you cannot upgrade this computer to Windows Server R2. Before you raise the domain functional level, you must upgrade all Windows based domain controllers in that domain to Windows Server or Windows Server R2. After you replace all the Windows based domain controllers in the forest with domain controllers that run Windows Server or Windows Server R2 , you can raise the forest functional level to Windows Server or Windows Server R2.
If you are able to raise your functional level, I recommend raising it to the highest level supported by ALL of your DCs and your Exchange server. A couple of notes about Exchange supportability:.
See the Exchange Server supportability matrix to find out what your Exchange server s support. I have 2 DCs in the environment and both of them on the same version server R2 and that is the maximum forest level and domain functional level supported.
I can get some results when I run these commands. Did your windows server join the domain successfully? To continue this discussion, please ask a new question. Adam CodeTwo. Get answers from your peers along with millions of IT pros who visit Spiceworks.
Popular Topics in Microsoft Exchange. Attachments: Up to 10 attachments including images can be used with a maximum of 3. Should not present any issues at current time. Hi, FFL and DFL impact only domain controllers by enabling a additional features and define the lowest version of operating system supported by the domain and the forest. But it's time to think to upgrade them to supported version.
Hello Andreas ,. Q: If I raise my forest functional level and domain functional level to would that cause any issues with servers and clients in the domain that is Windows 7, Windows Server and ? They also determine which Windows Server operating systems you can run on domain controllers in the domain or forest. However, functional levels do not affect which operating systems you can run on workstations and member servers that are joined to the domain or forest.
There should be no issue with the servers and clients in the domain that are Windows 7, Windows Server and
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