Step by Step guide to lower Active Directory Functional Level

Step by Step guide to lower Active Directory Functional Level

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In Windows Server 2008 R2 and Windows Server 2012, you can lower the Forest and Domain functional level from 2012 to 2008 R2, or from 2008 R2 to 2008. But you cannot lower it beyond 2008. Also, this is not possible by GUI, you have to use PowerShell for doing this. Let’s see how you can do it in the following steps:

 

1. Import the AD module

Import-Module -Name ActiveDirectory

 

2. Check the Forest Functional level of your Active Directory

Get-ADForest | Format-Table Name , ForestMode

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You can also check it by going to AD Domain and services.

 

3. Lower the Forest Functional Level and then the Domain Functional Level

Set-ADForestMode –Identity “woodgrovebank.com” –ForestMode Windows2008Forest

Set-ADDomainMode –Identity “woodgrovebank.com” –DomainMode Windows2008Domain

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4. To Confirm your Forest Functional level of your Active Directory

Get-ADForest | Format-Table Name , ForestMode

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The only thing that you want to keep in mind is your recycle bin functionality which should not be enabled. (Its disabled by default).

Hope this helps. Happy reading!

 

Comments
  • Very interesting. Thanks!

  • Gr8 Info.....Aman.

    Thanks!!

  • Well written and to the point... keep it up

  • great...

  • This does not work.

  • It worked for me but I had to remove quotation marks from the domain name. I downgraded the Forest and then the Domain from 2012 R2 to 2012, successfully. Thank you.

  • This process worked for me. Follow the steps explicitly.

  • Thanks for this.

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