Which should I raise first forest functional level or domain?
Table of Contents
In order to raise a forest functional level, all domains within that forest must be raised first.
Which console can you use to raise the forest functional level in Active Directory?
Active Directory Domains and Trusts console
Open the Active Directory Domains and Trusts console, right-click Domains and Active Directory Approval 1 , and click Increase Functional Level of Forest 2 .
What is Active Directory forest functional level?

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.
What are the necessary conditions and permissions required to raise domain or forest functional levels?
To activate the newest domain features, all the domain controllers must be running the newest Windows Server operating system version in the domain. If this requirement is met, the administrator can raise the domain functional level.
What happens when you raise domain functional level?
Forest functional level (FFL) A forest functional level determines the functionalities of AD DS that are enabled in a forest. Raising an FFL increases the capabilities of all the domain controllers (DC) in the forest.

What is the difference between forest functional level and domain functional level?
Two Types of Functional Levels# Domain functional levels enable features that affect the entire domain and that domain only. It also controls which Windows Server operating systems can be run on domain controllers in the domain. Forest functional levels enable features across all domains within a forest.
What happens when you raise the domain functional level?
What is forest and domain functional levels?
Domain functional levels enable features that affect the entire domain and that domain only. It also controls which Windows Server operating systems can be run on domain controllers in the domain. Forest functional levels. Forest functional levels enable features across all domains within a forest.
How do I check my forest functional level in Active Directory?
From the “Administrative Tools” menu, select “Active Directory Domains and Trusts” or “Active Directory Users and Computers“. Right-click the root domain, then select “Properties“. Under the “General” tab, the “Domain functional level” and “Forest functional level” is displayed on the screen.
Should I raise forest functional level?
The answer to the question about the impact of changing the Domain or Forest Functional Level is there should be no impact.
When should I raise forest functional level?
You must raise the AD DS Forest functional level or AD LDS Configuration Set functional level before this server can become an AD DS Domain Controller or an AD LDS Instance in this Forest or Configuration Set.