How to Check and Change the Domain and Forest Functional Level

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You can easily check the domain and forest functional levels using bellow steps.

  1. Admin Tools
  2. Powershell Command

Step 1. From Admin Tools

Open the “Administrative Tools” under the menu you have to select “Active Directory Domains and Trusts” or “Active Directory Users and Computers“.

Then right-click the root domain, and choose “Properties“.
Under the “General” tab, the “Domain functional level” and “Forest functional level” is displayed on the screen.

See the below image:

Step 2. From Powershell Command

To find the Domain Functional Level, use this command:

Get-ADDomain | fl Name,DomainMode

To find the Forest Functional Level, use this command:

Get-ADForest | fl Name,ForestMode

See the below image:

How to Change the Domain Functional Level

You can change the domain functional level by right-clicking the domain and selecting Raise Domain Functional Level..

How to Change the Forest Functional Level

You can change the forest functional level by right-clicking Active Directory Domains and Trusts and selecting Raise Forest Functional Level..

For more information on raising domain and forest functional levels.

Visit the Microsoft page – How to raise Active Directory domain and forest functional levels: https://support.microsoft.com/en-us/help/322692/how-to-raise-active-directory-domain-and-forest-functional-levels