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How to upgrade AD domain controllers with same domain

    Question

  • Is it possible to create new Domain Controllers without changing the domain?  Basically, we need to create the new domain with new servers, but with no connection to the old domain.  Supposedly our forest is corrupted and a new forest is needed with the same name.  Again, with no replication to the old domain has to be the solution.  Can it be done?
    Tuesday, April 4, 2017 2:28 AM

All replies

  • You can create new domain controller in a new forest with same name, but it should not be pointing to the old DNS.

    After the Domain controller is ready, you will put DNS of the new Domain controller in the Client's DNS settings and remove the old one.

    Then you can Join this PC to the new domain.

    You should take the backup of Users profiles before joining to the new domain.



    My Blog: www.ADExchangeAdmin.com

    Tuesday, April 4, 2017 4:45 AM
  • Yes, you can promote a new forest with the same name and both will be considered as separate.

    You may have to make the changes if you have anything published in internet to point to the new forest.

    But let me ask you this?

    1. What was happened to your existing forest? Do you have a windows system state back up of the existing DCs when it was in working condition?

    2. How large is your existing forest or how complicated is this? This will help us in understanding if it is easy to demote and promote or recover your existing forest.

    Please remember to mark this as answer if it helps you.

    Tuesday, April 4, 2017 5:03 AM
  • Is it possible to create new Domain Controllers without changing the domain?  Basically, we need to create the new domain with new servers, but with no connection to the old domain.  Supposedly our forest is corrupted and a new forest is needed with the same name.  Again, with no replication to the old domain has to be the solution.  Can it be done?

    Hi

     You can create a new forest with same name,but you should rejoin clients to new domain also the user profiles,etc.. will be lost at least.

     So if you a have a successful backup,you can restore domain from this backup,maybe this is the easy way.

    Active Directory Forest Recovery

    https://social.technet.microsoft.com/wiki/contents/articles/7668.active-directory-forest-recovery.aspx


    This posting is provided AS IS with no warranties or guarantees,and confers no rights. Best regards Burak Uğur

    Tuesday, April 4, 2017 6:39 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,

    Alvin Wang


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

    Wednesday, April 12, 2017 2:02 AM
    Moderator