Lower the functional level of your domain or forest on Windows Server

Not as common as it seems, more often necessary to downgrade your domain or forest, either because they are configured only for a very recent version of the Windows Server family, as shown in the example below (Windows Server 2012) and I need to perform demotion to Windows 2008 R2, in order to study.

Read more:

The 9 most common reasons for Windows failures
How to Upgrade Windows Server 2012 R2 Standard to Windows Server 2016 Datacenter
How to Restart Windows Server via CMD and Powershell
Storing SSH keys in Active Directory for easy deployment
Migrating / Importing DHCP from Windows Server 2008 to 2012/2016/2019
Enabling RDP in Windows Server 2016

Remembering that it is not recommended to have Windows 2008 in your environment due to its end of support on January 14, 2020.

In this step, the domain level will be lowered to Windows Server 2008 R2, as shown in the figure below:

Set-ADDomainMode -Identity "yourdomain" -DomainMode "version you want"

In this other step, the forest level will be lowered to Windows Server 2008 R2, shown in the figure below:

Set-ADForestMode -Identity "yourdomain" -ForestMode "backwant" 

#Profissa: Take a professional course!
Ensure a certified course in IT and Software through the online study platform Udemy.
click here and check out all the latest technology courses!

After performing both domain and forest downgrades, new settings can be checked with the command Get-ADDomain and ForestMode, or through one's own Active Directory as shown below:

As a result it was possible to insert a domain controller with the version of Windows Server 2008 R2, this due to the lowering of the forest and domain level, observing the figure below:

reference: Mateus Henrique Tremonte Coimbra

Was this article helpful?

To maintain a quality standard for you, we have invested in a great hosting plan, Paid CDN, Website Optimization Plugins, etc ...

Help us to keep the project active! 

Follow the news in real time. Follow our Instagram profile.

Felipe Santos
Felipe Santos is a Cloud and Security Architect, with experience in Windows Server, Cluster, Storages, Backups Veeam and Office 365 environments.
en_USEnglish

UP TO 90% DISCOUNT

TAKE OFF YOUR CAREER !!

Do you want to upgrade your career? 

Invest in yourself and get ahead! Get that dream job in 2021!