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Upgrade the functional level from Windows 2003 to Windows 2008 R2 RRS feed

  • Question

  • Hi,

    What's the prerequisites to upgrade the functional level from Windows 2003 to Windows 2008R2?

    Sunday, January 19, 2020 10:19 PM

Answers

  • Hi,

    What's the prerequisites to upgrade the functional level from Windows 2003 to Windows 2008R2?

    Hi,

    To upgrade the domain functional level , you have to migrate all domain controller to Windows 2008 R2 or higher. Once you complete the domain functional on all domains in the forest , you can upgrade the forest functional level.


    Please don't forget to mark the correct answer, to help others who have the same issue. Thameur BOURBITA MCSE | MCSA My Blog : http://bourbitathameur.blogspot.fr/

    Sunday, January 19, 2020 10:24 PM

All replies

  • Hi,

    What's the prerequisites to upgrade the functional level from Windows 2003 to Windows 2008R2?

    Hi,

    To upgrade the domain functional level , you have to migrate all domain controller to Windows 2008 R2 or higher. Once you complete the domain functional on all domains in the forest , you can upgrade the forest functional level.


    Please don't forget to mark the correct answer, to help others who have the same issue. Thameur BOURBITA MCSE | MCSA My Blog : http://bourbitathameur.blogspot.fr/

    Sunday, January 19, 2020 10:24 PM
  • In short, you cannot have any domain controllers running the operating system lower than the one designated by the functional level. Effectively, in your case, all domain controllers would have to be running Windows Server 2008 R2 or newer. Considering that Windows Server 2008 R2 is already past its end of life, you might want to use a newer Windows Server OS

    hth
    Marcin

    Sunday, January 19, 2020 10:45 PM
  • Windows Server 2008R2
    Supported Domain Controller Operating System:

    • Windows Server 2019
    • Windows Server 2016
    • Windows Server 2012 R2
    • Windows Server 2012
    • Windows Server 2008 R2

    https://docs.microsoft.com/en-us/windows-server/identity/ad-ds/active-directory-functional-levels#windows-server-2008r2

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Sunday, January 19, 2020 11:37 PM
  • Hello,

    Thank you for posting in our TechNet forum.

    Before we do any changes to our AD environment, we had better to check our AD environment health. So we can try the following steps:

    1.We need to check if all the DCs works fine, we can run Dcdiag /v on each DC to check.
    2. Run Repadmin /showrepl and repadmin /replsum on all DCs to check AD replication status.
    3: If you want to upgrade functional level, you need to ensure all the domain controllers be windows 2008r2 or higher.
    4: The following link can be for your reference.
    Understanding Active Directory Domain Services (AD DS) Functional Levels:
    https://docs.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc754918(v=ws.10)?redirectedfrom=MSDN
    How to raise Active Directory domain and forest functional levelshttps://support.microsoft.com/en-us/help/322692/how-to-raise-active-directory-domain-and-forest-functional-levels

    Best regards

    Jolin


    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Monday, January 20, 2020 6:54 AM
  • Hi,

     

    Just checking in to see if the information provided was helpful. Please let us know if you would like further assistance.

     

    Best Regards,

    Fan


    Please remember to mark the replies as an answers if they help. If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com

    Wednesday, January 22, 2020 8:47 AM
  • Dear Dave,

    Which domain joined Desktop Operating systems version support and doesn't support for DFL/FFL windows 2008R2.

    Regards

    Anand Sunka


    Thanks & Regards Anand Sunka MCSA+CCNA+MCTS

    Thursday, January 23, 2020 1:30 PM
  • Any currently supported version of the client OS supports WS 2008 R2 DFL/FFL

    hth
    Marcin

    Thursday, January 23, 2020 2:22 PM
  • Dear Dave,

    Which domain joined Desktop Operating systems version support and doesn't support for DFL/FFL windows 2008R2.

    The correct editions of all currently supported desktop versions will work.

     

     



    Regards, Dave Patrick ....
    Microsoft Certified Professional
    Microsoft MVP [Windows Server] Datacenter Management

    Disclaimer: This posting is provided "AS IS" with no warranties or guarantees, and confers no rights.

    Thursday, January 23, 2020 2:30 PM