Active Directory, Windows

Forest and Domain functional level (Comparison chart)

Hi all

I am creating this post more for my own reference. There are times when I have to look at what all new features a particular functional level has offered. I don’t need to create chart as its already on technet. Here is the link:

https://technet.microsoft.com/en-us/library/understanding-active-directory-functional-levels(v=ws.10).aspx

A very important point to note is with versions of Windows Server that are earlier than Windows Server 2008 R2, you cannot roll back or lower a functional level under any circumstances. If you have to revert to a lower functional level with a version of Windows Server that is earlier than Windows Server 2008 R2, you must rebuild the domain or forest or restore it from a backup copy. With Windows Server 2012 and R2 it is possible to roll back forest and domain functional level with limitation as defined in table in the link.

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Published by Vinit Pandey

I’m a Microsoft Certified Trainer (MCT) with over 18 years of experience in the IT industry, backed by certifications including MCSE, MCITP, and MCTS. My core expertise lies in AI, Windows Server and Client platforms, and a wide range of endpoint and infrastructure management tools such as System Center (MECM, SCOM, SCVMM), Intune, Systrack, Nexthink, Yellow.AI, PowerShell, Nomad, Tachyon, and Shopping. I also have hands-on experience with virtualization and high availability technologies like Hyper-V and Failover Clustering, as well as cloud platforms like Microsoft Azure. I hold a B.Tech degree in Electronics and Communication and currently serve as Associate Director at LTIMindtree, where I lead Digital Experience initiatives. My role involves driving transition, transformation, and migration programs for global clients, often providing strategic consulting on planning and execution. Originally from Chousa (Buxar), a place rich in historical significance, I enjoy blogging in my spare time and love spending quality moments with my daughters, Shreya and Reet, and our pet dog, Tiger.

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