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Active Directory migration 2003 R2 to 2012 R2 with office 365 on board

    Question

  • Hello,

    I would like to know if it is possible to migrate the active directory from (2003 R2 to 2012 R2) without an impact to other services for exemple office 365 , sharepoint or other services on board.

    I would like to migrate without changing all the IPs with a transition server for exemple; and keep all the legacy configurations.

    Keeping names and Ips for 3 active directory servers.

    Best regards.


    Tuesday, November 22, 2016 8:07 PM

All replies

  • Hi,

    To keep the same IPs, here's basic steps you can follow.

    1. Setup the 2012 R2 servers as DCs and DNS with different IPs on the same subnet.

    2. Shutdown one of your two 2003 R2 DC/DNS servers (service should still be available due to the secondary DC/DNS server that is still up).

    3. Change IP of one of your two 2012 R2 servers to the IP of the server you just shut down.

    4. Either reboot the 2012 R2 server or, ipconfig /registerdns and restart the netlogon service.

    5. Disconnect shutdown 2003 R2 server from network, change IP and reboot or /registerdns and restart netlogon. (Might as well reboot and reconnect since there should be any service impact.)

    6. Transfer FSMO roles to the 2012 R2 server, give some time to replicate.

    7. Demote the 2003 R2 domain controller you've changed.

    Repeat steps for the second 2003 R2 and 2012 R2 servers (transferring of FSMO roles will be optional).

    Some articles for your reference:

    Step-By-Step: Active Directory Migration from Windows Server 2003 to Windows Server 2012 R2

    https://blogs.technet.microsoft.com/canitpro/2014/04/01/step-by-step-active-directory-migration-from-windows-server-2003-to-windows-server-2012-r2/

    Upgrading an Active Directory Domain from Windows Server 2003 or Windows Server 2003 R2 to Windows Server 2012 or Windows Server 2012 R2

    http://blogs.msmvps.com/mweber/2012/07/30/upgrading-an-active-directory-domain-from-windows-server-2003-or-windows-server-2003-r2-to-windows-server-2012/

    Best Regards,

    Alvin Wang


    Please remember to mark the replies as answers if they help.
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    • Proposed as answer by AlvwanModerator Thursday, December 8, 2016 11:58 AM
    Thursday, December 1, 2016 8:57 AM
    Moderator
  • 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.

    Thursday, December 8, 2016 11:58 AM
    Moderator