Functional Level || active directory functional level || windows server 2016 || forest level ||MCSE

October 8, 2020 Alice AUSTIN

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topic covered in this video…….
Functional levels determine the available Active Directory Domain Services (AD DS) domain or forest capabilities. 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.
When you deploy AD DS, set the domain and forest functional levels to the highest value that your environment can support. This way, you can use as many AD DS features as possible. When you deploy a new forest, you are prompted to set the forest functional level and then set the domain functional level. You can set the domain functional level to a value that is higher than the forest functional level, but you cannot set the domain functional level to a value that is lower than the forest functional level.
With the end of life of Windows Server 2003, 2008, and 2008 R2, these domain controllers (DCs) need to be updated to Windows Server 2012, 2012 R2, 2016, or 2019. As a result, any domain controller that runs Windows Server 2008 R2 and older should be removed from the domain.
Windows Server 2019
There are no new forest or domain functional levels added in this release.
The minimum requirement to add a Windows Server 2019 Domain Controller is a Windows Server 2008 functional level. The domain also has to use DFS-R as the engine to replicate SYSVOL.
Windows Server 2016
Supported Domain Controller Operating System:
Windows Server 2019
Windows Server 2016
Windows Server 2012
Supported Domain Controller Operating System:
Windows Server 2019
Windows Server 2016
Windows Server 2012 R2
Windows Server 2012
Windows Server 2008R2
Supported Domain Controller Operating System:
Windows Server 2019
Windows Server 2016
Windows Server 2012 R2
Windows Server 2012
Windows Server 2008 R2