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Upgrade 2003-R2 32-bit to 2003-R2 64-bit windows domain

    Question

  • Hi,

    We are having Windows 2003 Domain on 32-bit architecture. We have single domain/forest. One Primary DC + a Backup DC at HO and other 3 DC at branches with GC.

    I want to upgrade only the Primary DC + second DC at HO to Windows Server 2008, R2.

    I have read the docs online and also have the step-by-step guide which is clear. I would like to clear below doubts.

    - Before upgrade i will have to install Windows server 2008, R2 on 64-bit architecture ? (The new hardware that i will use to install the DC is 64-bit)

    - After that i can add it to existing Windows 2003 (32-bit) Domain ?

    - Can i change the IP Address of the new Windows Server 2008, R2 DC after assigning it as Primary DC with the old primary DC ? (To avoid changing the ip addresss of all clients)

    - If i can change the ip Address of new 2008 DC with the old 2003 DC, then i will demote the old primary DC as well.

    Please guide.

    abc

    Wednesday, February 22, 2012 1:08 PM

Answers

  • Hello,

    "- Before upgrade i will have to install Windows server 2008, R2 on 64-bit architecture ? (The new hardware that i will use to install the DC is 64-bit)"

    Correct.

    "- After that i can add it to existing Windows 2003 (32-bit) Domain ?"

    Correct.

    "- Can i change the IP Address of the new Windows Server 2008, R2 DC after assigning it as Primary DC with the old primary DC ? (To avoid changing the ip addresss of all clients)"

    As the new DC/DNS/GC should become the from you called primary, PDC/BDC concept is gone, this result in transfer from all FSMO roles to it http://support.microsoft.com/kb/324801.

    1. change the old DC to another free ip address, run ipconfig /flushdns and ipconfig /registerdns and restart the netlogon service.

    2. now check the DNS zones, zone properties and the Name server tab inthe DNS management console

    3. go on with the support tools repadmin and dcdiag to control that replication is error free and the DC/Domain is healthy.

    4. if the above is all done go on with the new DC and do all the same steps of course change to the now free ip address from the old DC.

    After transfer from the PDCEmulator FSMO the time service must be reconfigured on the old/new PDCEmulator, details in: http://msmvps.com/blogs/mweber/archive/2010/06/27/time-configuration-in-a-windows-domain.aspx

    Even if you may have read lot's of articles: http://msmvps.com/blogs/mweber/archive/2010/02/10/upgrading-an-active-directory-domain-from-windows-server-2003-to-windows-server-2008-or-windows-server-2008-r2.aspx

    BEFORE demoting the old DC i suggest to disconnect it from the domain, 1-2 days, and check that all services etc. are up and running. If that is the case reconnect the old DC, let it replicate check with the support tools and start demoting.


    Best regards

    Meinolf Weber
    MVP, MCP, MCTS
    Microsoft MVP - Directory Services
    My Blog: http://msmvps.com/blogs/mweber/

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

    • Marked as answer by abckid Wednesday, February 22, 2012 1:59 PM
    Wednesday, February 22, 2012 1:47 PM

All replies

  • Hello,

    "- Before upgrade i will have to install Windows server 2008, R2 on 64-bit architecture ? (The new hardware that i will use to install the DC is 64-bit)"

    Correct.

    "- After that i can add it to existing Windows 2003 (32-bit) Domain ?"

    Correct.

    "- Can i change the IP Address of the new Windows Server 2008, R2 DC after assigning it as Primary DC with the old primary DC ? (To avoid changing the ip addresss of all clients)"

    As the new DC/DNS/GC should become the from you called primary, PDC/BDC concept is gone, this result in transfer from all FSMO roles to it http://support.microsoft.com/kb/324801.

    1. change the old DC to another free ip address, run ipconfig /flushdns and ipconfig /registerdns and restart the netlogon service.

    2. now check the DNS zones, zone properties and the Name server tab inthe DNS management console

    3. go on with the support tools repadmin and dcdiag to control that replication is error free and the DC/Domain is healthy.

    4. if the above is all done go on with the new DC and do all the same steps of course change to the now free ip address from the old DC.

    After transfer from the PDCEmulator FSMO the time service must be reconfigured on the old/new PDCEmulator, details in: http://msmvps.com/blogs/mweber/archive/2010/06/27/time-configuration-in-a-windows-domain.aspx

    Even if you may have read lot's of articles: http://msmvps.com/blogs/mweber/archive/2010/02/10/upgrading-an-active-directory-domain-from-windows-server-2003-to-windows-server-2008-or-windows-server-2008-r2.aspx

    BEFORE demoting the old DC i suggest to disconnect it from the domain, 1-2 days, and check that all services etc. are up and running. If that is the case reconnect the old DC, let it replicate check with the support tools and start demoting.


    Best regards

    Meinolf Weber
    MVP, MCP, MCTS
    Microsoft MVP - Directory Services
    My Blog: http://msmvps.com/blogs/mweber/

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

    • Marked as answer by abckid Wednesday, February 22, 2012 1:59 PM
    Wednesday, February 22, 2012 1:47 PM
  •  

    Hi,

    In addition to the above suggestions, here’s more information which might be helpful for you:

    Active Directory: Active Directory Upgrade - High Level Steps

    http://social.technet.microsoft.com/wiki/contents/articles/2903.aspx

    If you need further assistance, please feel free to let us know.

    Regards,

    Bruce

    Thursday, February 23, 2012 9:15 AM