Till now, we have successfully transferred two FSMO roles, the Schema Master role and the Domain Naming role. The last three roles can be transferred using a single Snap-in.

• Using Active Directory Users and Computers snap-in to transfer the RID Master, PDC Emulator, and Infrastructure Master Roles
  

1. Click Start > Administrative Tools > then click Active Directory Users and Computers
2. Right click Active Directory Users and Computers, then click All Tasks > Operations Master…
3. You will have three Tabs, representing three FSMO roles (RID, PDC, Infrastructure). Click the Change button under each of these three tabs to transfer the roles.

   Click Yes to confirm the role transfer

   

   The role will be transferred and a confirmation message will be displayed. Click OK
   
   

   As for the Infrastructure role, once you click on the Change button you will receive the below message

   

   By default, when you first install your first Domain Controller, it holds the five roles and beside that it is a Global Catalog. If your environment is a multi-domain/forest, then you should think about structuring your FSMO roles and transfer the Infrastructure role to a none Global Catalog domain controller. Else if you have small number of domain controllers ( ex. two domain controllers) then you should not worry about this. Click Yes

   

4. The Tabs should now look like this:

That’s it, by now, you have successfully transferred the five FSMO roles to the Windows Server 2008 Domain Controller.

Crédito : http://www.elmajdal.net/win2k8/Transferring_FSMO_Roles_in_Windows_Server_2008.aspx

To clean up metadata

1. At the command line, type Ntdsutil and press ENTER.

C:\WINDOWS>ntdsutil
ntdsutil:

1. At the Ntdsutil: prompt, type metadata cleanup and press Enter.

ntdsutil: metadata cleanup
metadata cleanup:

1. At the metadata cleanup: prompt, type connections and press Enter.

metadata cleanup: connections
server connections:

1. At the server connections: prompt, type connect to server <servername>, where <servername> is the domain controller (any functional domain controller in the same domain) from which you plan to clean up the metadata of the failed domain controller. Press Enter.

server connections: connect to server server100
Binding to server100 ...
Connected to server100 using credentials of locally logged on user.
server connections:

Note: Windows Server 2003 Service Pack 1 eliminates the need for the above step.

1. Type quit and press Enter to return you to the metadata cleanup: prompt.

server connections: q
metadata cleanup:

1. Type select operation target and press Enter.

metadata cleanup: Select operation target
select operation target:

1. Type list domains and press Enter. This lists all domains in the forest with a number associated with each.

select operation target: list domains
Found 1 domain(s)
0 - DC=dpetri,DC=net
select operation target:

1. Type select domain <number>, where <number> is the number corresponding to the domain in which the failed server was located. Press Enter.

select operation target: Select domain 0
No current site
Domain - DC=dpetri,DC=net
No current server
No current Naming Context
select operation target:

1. Type list sites and press Enter.

select operation target: List sites
Found 1 site(s)
0 - CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
select operation target:

1. Type select site <number>, where <number> refers to the number of the site in which the domain controller was a member. Press Enter.

select operation target: Select site 0
Site - CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
Domain - DC=dpetri,DC=net
No current server
No current Naming Context
select operation target:

1. Type list servers in site and press Enter. This will list all servers in that site with a corresponding number.

select operation target: List servers in site
Found 2 server(s)
0 - CN=SERVER200,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
1 - CN=SERVER100,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
select operation target:

1. Type select server <number> and press Enter, where <number> refers to the domain controller to be removed.

select operation target: Select server 0
Site - CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
Domain - DC=dpetri,DC=net
Server - CN=SERVER200,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
 DSA object - CN=NTDS Settings,CN=SERVER200,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net
 DNS host name - server200.dpetri.net
 Computer object - CN=SERVER200,OU=Domain Controllers,DC=dpetri,DC=net
No current Naming Context
select operation target:

1. Type quit and press Enter. The Metadata cleanup menu is displayed.

select operation target: q
metadata cleanup:

1. Type remove selected server and press Enter.

You will receive a warning message. Read it, and if you agree, press Yes.

metadata cleanup: Remove selected server

"CN=SERVER200,CN=Servers,CN=Default-First-Site-Name,CN=Sites,CN=Configuration,DC=dpetri,DC=net" removed from server "server100"
metadata cleanup:

At this point, Active Directory confirms that the domain controller was removed successfully. If you receive an error that the object could not be found, Active Directory might have already removed from the domain controller.

Crédito : http://www.petri.co.il/delete_failed_dcs_from_ad.htm

Sintaxe

DCGPOFix [/Target: Domain | DC | BOTH]

Parâmetros

/Target: Domain
Specifies the target domain name.
/DC Domain Controller
Specifies the target domain controller name.
/BOTH Domain and Domain Controller
Specifies both the target Domain name and Domain Controller name.

Exemplo

O exemplo abaixo mostra com usar comando DCGPOFix

DCGPOFix /Target: MyDomain | DC

Como utilizar a ferramenta DCGPOfix:

Siga os passos descritos abaixo para que você consiga restaurar as GPOs padrões do Sistema Operacional Windows Server 2003®.

• Clique no menu iniciar > executar e digite cmd e pressione Enter conforme figura abaixo:

– Logo após no prompt de comando digite dcgpofix e pressione Enter conforme figura abaixo

– Leia as informações e pressione a tecla Y (figura abaixo)

– Leia novamente a mensagem de aviso e pressione Y

– Em seguida será exibida a informação que as GPOs foram restauradas com sucesso. (Figura abaixo):

Crédito : http://technet.microsoft.com/pt-br/library/cc668485.aspx