Migration from Windows 2000 to Windows 2008 R2

Discussion in 'Server Migration' started by TC, Jan 29, 2010.

  1. TC

    TC Guest

    Dear all,

    Our company are planning to migrate the Windows domain from Windows 2000 to
    Windows 2008 R2. Because the user group is small and the existing domain
    group policies is somehow messy and undocmented. I prefer to a clear startup.

    I will setup a new domain with a Windows 2008 R2 server use test PC to test
    all required settings. After the new server can work normally, I will move
    the member server and client to the new domain.

    I have a few question.
    1) Which function level should I use? After migration, I will not have DC on
    Windows 2000 Server, but I still have windows 2000 member server.
    2) Is it possible I use the same domain name as the existing one if I do the
    migration as mentioned above?

    Thanks and Regards,
    TC, Jan 29, 2010
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  2. Hello TC,

    Your questions answer are at the end.


    - Do you use any kind of Exchange in the 2000 domain? If yes, which one?

    - On the old server open DNS management console and check that you are running
    Active directory integrated zone (easier for replication, if you have more
    then one DNS server)

    - run replmon from the run line or repadmin /showreps(only if more then one
    DC exist), dcdiag and netdiag from the command prompt on the old machine
    to check for errors, if you have some post the complete output from the command
    here or solve them first. For this tools you have to install the support\tools\suptools.msi
    from the 2000 installation disk.

    - run adprep /forestprep and adprep /domainprep and adprep /domainprep /gpprep
    and adprep /rodcprep from the 2008 installation disk against the 2000 schema
    master(forestprep) / infrastructure master(domainprep/rodcprep), with an
    account that is member of the Schema/Enterprise/Domain admins, to upgrade
    the schema to the new version (44) or 2008 R2 (47)

    - you can check the schema version with "schupgr" or "dsquery * cn=schema,cn=configuration,dc=domainname,dc=local
    -scope base -attr objectVersion" without the quotes in a command prompt

    - Install the new machine as a member server in your existing domain

    - configure a fixed ip and set the preferred DNS server to the old DNS server
    only, think about disabling IPv6 if you are not using it, some known problems
    exist with it. Follow (http://blogs.dirteam.com/blogs/paulbergson/archive/2009/03/19/disabling-ipv6-on-windows-2008.aspx)
    to disable it

    - run dcpromo and follow the wizard to add the 2008 server to an existing
    domain, make it also Global catalog and DNS server.

    - for DNS give the server time for replication, at least 15 minutes. Because
    you use Active directory integrated zones it will automatically replicate
    the zones to the new server. Open DNS management console to check that they

    - if the new machine is domain controller and DNS server run again replmon,
    dcdiag on both domain controllers. For using netdiag.exe on 2008, NOT 2008
    R2, you have to download and install (http://www.microsoft.com/downloads/...11-FD83-419D-939B-9A772EA2DF90&displaylang=en),
    ignore the compatibility warning, or extract netdiag.exe only and copy it

    - Transfer, NOT seize the 5 FSMO roles to the new Domain controller (http://support.microsoft.com/kb/324801
    applies also for 2008/2008R2), FSMO should always be on the newest OS DC

    - after transfer of the PDCEmulator role, configure the NEW PDCEmulator to
    an external timesource and reconfigure the old PDCEmulator to use the domainhierarchie
    now. Therefore run on the NEW "w32tm /config /manualpeerlist:pEERS /syncfromflags:manual
    /reliable:yes /update" where PEERS will be filled with the ip address or
    server(time.windows.com) and on the OLD one run "w32tm /config /syncfromflags:domhier
    /reliable:no /update" and stop/start the time service on the old one. All
    commands run in an elevated command prompt without the quotes.

    - you can see in the event viewer (Directory service) that the roles are
    transferred, also give it some time

    - reconfigure the DNS configuration on your NIC of the 2008 server, preferred
    DNS itself, secondary the old one

    - if you use DHCP do not forget to reconfigure the scope settings to point
    to the new installed DNS server

    Demoting the old DC(if needed, but at leasst you should have 2 DC/DNS/GC
    per domain)

    - reconfigure your clients/servers that they not longer point to the old
    DC/DNS server on the NIC

    - to be sure that everything runs fine, disconnect the old DC from the network
    and check with clients and servers the connectivity, logon and also with
    one client a restart to see that everything is ok

    - then run dcpromo to demote the old DC, if it works fine the machine will
    move from the DC's OU to the computers container, where you can delete it
    by hand. Can be that you got an error during demoting at the beginning, then
    uncheck the Global catalog on that DC and try again

    - check the DNS management console, that all entries from the machine are
    disappeared or delete them by hand if the machine is off the network for ever

    - also you have to start AD sites and services and delete the old servername
    under the site, this will not be done during demotion

    1. If no older OS DC exist you can choose the Windows server 2008 R2 functional
    levels. Member servers are not effected form functional levels.

    2. If you like to use the same domain name follow the way above. If you create
    a new domain with the same name all user accounts, policies settings, permissions,
    etc. must be created new. Also all computers must be joined to the new domain.
    Using theb same name will NOT keep any option on the old computers.

    Best regards

    Meinolf Weber
    Meinolf Weber [MVP-DS], Jan 29, 2010
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  3. TC

    kj [SBS MVP] Guest

    Good *old* Server 2000 Schema masters often need a modification before new
    extentions ae allowed.
    See the following in advance to avoid the error;

    kj [SBS MVP], Jan 29, 2010
  4. Hello kj [SBS MVP],

    Will add this to my step by step, i saw this that seldom that i didn't thought
    of it. Thank you for the hint. :)

    Best regards

    Meinolf Weber
    Meinolf Weber [MVP-DS], Jan 30, 2010
  5. TC

    TC Guest

    Thanks Meinolf Weber [MVP-DS] and kj,

    You information will be useful, let me review and test it.

    We haven't used any Exchange server in our office.

    Just one more silly question, How can I transfer the AD to the testing
    machine for testing if the hardware is not the same?

    TC, Feb 1, 2010
  6. Hello TC,

    AD is not hardware dependend, the OS is it and if the machine has the requirements
    for Windows server 2008 you will be safe. Just install the new server and
    you will be fine.

    Best regards

    Meinolf Weber

    Meinolf Weber [MVP-DS], Feb 1, 2010
  7. TC

    kj [SBS MVP] Guest

    Fortunately fewer 2000 schema masters floating around makes this a vanishing
    need... but still worthy for a while longer though.

    Pleased to contribute, Meinolf.
    kj [SBS MVP], Feb 1, 2010
  8. Meinolf,

    You should blog this procedure. :)


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

    Please reply back to the newsgroup or forum for collaboration benefit among
    responding engineers, and to help others benefit from your resolution.

    Ace Fekay, MVP, MCT, MCITP EA, MCTS Windows 2008 & Exchange 2007, MCSE &
    MCSA 2003/2000, MCSA Messaging 2003
    Microsoft Certified Trainer
    Microsoft MVP - Directory Services

    If you feel this is an urgent issue and require immediate assistance, please
    contact Microsoft PSS directly. Please check http://support.microsoft.com
    for regional support phone numbers.
    Ace Fekay [MVP-DS, MCT], Feb 2, 2010
  9. With KJ's additions, of course! :)

    Ace Fekay [MVP-DS, MCT], Feb 2, 2010
  10. Hello Ace Fekay [MVP-DS, MCT],

    I send an email some weeks ago to Susan from msmvps but until now i didn't
    get an answer. I will do it again today.

    Best regards

    Meinolf Weber

    Meinolf Weber [MVP-DS], Feb 2, 2010

  11. Sometimes she's pretty busy. Catch her in the SBS group, maybe respond an OT
    to one of her posts.

    Ace Fekay [MVP-DS, MCT], Feb 3, 2010
  12. Hello Ace Fekay [MVP-DS, MCT],

    Tried it yesterday again and my blog is prepared, no article until now. So
    hopefully i get it running in the next days with the 1st articles.


    Best regards

    Meinolf Weber

    Meinolf Weber [MVP-DS], Feb 3, 2010
  13. Cool! Glad to see you got it ready. Looking forward to reading your
    articles. I have a feeling you will start wtih this one in this thread. :)

    Ace Fekay [MVP-DS, MCT], Feb 3, 2010
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