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Fix Group Policy Objects and Links

Updated: October 15, 2008

Applies To: Windows Server 2008, Windows Server 2008 R2

You can use this procedure to fix Group Policy objects (GPOs) and links after a domain rename operation. In this procedure, you use the Gpfixup.exe command-line tool to repair GPOs as well as GPO references in each renamed domain. It is necessary to repair the GPOs and the Group Policy links after a domain rename operation to update the old domain name that is embedded in these GPOs and their links. This procedure is necessary so that Group Policy continues to function normally in the new forest after the domain rename operation is complete. The Gpfixup.exe tool also repairs any Group Policy–based Software Installation and Maintenance data (such as Software Distribution Point network paths), if they are present in Active Directory Domain Services (AD DS), so that managed software deployment continues to work in your environment. The GPO and link fix-up tool must be run once in each renamed domain. There is no GPO and link fix-up required that corresponds to renamed application directory partitions because you cannot apply Group Policy to an application directory partition.

ImportantImportant
The GPO/link fix-up procedure does not fix any interdomain GPO links that might exist in your forest. Any existing interdomain GPO links must be either removed or reconfigured so that they can work properly. In addition, this fix-up procedure does not repair network paths for Software Distribution Points (present in AD DS) that are external to the domain. As a best practice, do not use GPO links that cross domain boundaries.

Before you repair GPOs, ensure that the following conditions are satisfied:

  • All procedures that are described in Run Domain Rename Instructions, that include the automatic domain controller restart, must have been completed on all domain controllers in the renamed domains.

  • The domain controller with the primary domain controller (PDC) emulator operations master role in a renamed domain must have successfully completed the domain rename operation, and it must have reached the final "Done" state as described in Run Domain Rename Instructions.

  • The control station computer must have been restarted twice, as described in Unfreeze the Forest Configuration.

  • All member servers in the domain that host Software Distribution Points (network locations from which users deploy managed software in your environment) must have been restarted twice, as described in Run Domain Rename Instructions. This prerequisite step is extremely important and necessary for the Software Installation and Maintenance data fix-up to work correctly.

Membership in the Enterprise Admins group in the target forest is the minimum required to complete these procedures. The access check that you perform in this procedure requires that you have write access to the gpLink attribute on the site, domain, and organizational unit (OU) objects, as well as write access to the GPOs themselves.

noteNote
You can use credentials other than the credentials with which you are currently logged on. To use alternative credentials, use the /user and /pwd command-line switches of gpfixup, as described in Appendix B: Command-Line Syntax for the Gpfixup Tool.

  1. On the control station, click Start, click Run, type cmd, and then click OK.

  2. At the command prompt, type the following command to change to the working directory, and then press ENTER:

    C:\domren
    
  3. From within the working directory, type the following command, and then press ENTER. The entire command must be typed on a single line, although it is shown on multiple lines for clarity.

    gpfixup /olddns:OldDomainDnsName 
            /newdns:NewDomainDNSName
            /oldnb:OldDomainNetBIOSName
            /newnb:NewDomainNetBIOSName
            /dc:DcDnsName 2>&1 >gpfixup.log
    
    noteNote
    The command-line parameters /oldnb and /newnb are required only if the NetBIOS name of the domain changed. Otherwise, you can omit these parameters from the command line for Gpfixup.

    The output of the command—both status or error output—is saved to the file Gpfixup.log, which you can display periodically to monitor the progress of the command.

  4. To force replication of the Group Policy fix-up changes that are made at the domain controller that is named in DcDNSName in step 3 of this procedure to the rest of the domain controllers in the renamed domain, type the following command, and then press ENTER:

    repadmin /syncall /d /e /P /q DcDnsName NewDomainDN 
    

    Where:

    • DcDnsName is the Domain Name System (DNS) host name of the domain controller that was targeted by the gpfixup command.

    • NewDomainDN is the distinguished name that corresponds to the new DNS name of the renamed domain.

  5. Repeat steps 2 and 3 in this procedure for every renamed domain. You can enter the commands in sequence for each renamed domain.

    For example, using the sample forest and domain name changes in Specify the New Forest Description, you run the gpfixup command twice—once for the renamed cohovineyard.com domain and once for the sales.cohovineyard.com domain, as indicated in the following example:

    gpfixup /olddns:cohovineyard.com  /newdns:cohowinery.com
    /oldnb:cohovineyard  /newnb:cohowinery
    /dc:dc1.cohovineyard.com  2>&1 >gpfixup1.log
    repadmin /syncall /d /e /P /q dc1.cohovineyard.com dc=cohowinery,dc=com
    gpfixup /olddns:sales.cohovineyard.com  /newdns:sales.cohowinery.com  
    /dc:dc3.sales.cohovineyard.com  2>&1 >gpfixup2.log
    repadmin /syncall /d /e /P /q dc3.sales.cohovineyard.com
    dc=sales,dc=cohowinery,dc=com
    
    ImportantImportant
    Run the gpfixup command only once for each renamed domain. Do not run it for renamed application directory partitions.

    noteNote
    The DNS host names for the domain controllers in the renamed domains that are used in these command invocations still reflect the old DNS name for the domain. As mentioned earlier, the DNS host name of a domain controller in a renamed domain does not change automatically as a result of the domain name change.

 

Parameter Description

gpfixup

Fixes domain name dependencies in Group Policy objects and Group Policy links after a domain rename operation.

/olddns:OldDomainDnsName

Specifies the old DNS name of the renamed domain.

/newdns:NewDomainDNSName

Specifies the new DNS name of the renamed domain.

/oldnb:OldDomainNetBIOSName

Specifies the old NETBIOS name of the renamed domain.

/newnb:NewDomainNetBIOSName

Specifies the new NETBIOS name of the renamed domain.

/dc:DcDnsName 2>&1 >gpfixup.log

Contains status or error output of the command.

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