To check which server currently holds the FSMO, from the command prompt run Netdom Query FSMO
To transfer the FSMO roles:
Transferring the Domain-Specific Roles: RID, PDC, and Infrastructure Master

  1. Click Start, point to Programs, point to Administrative Tools, and then click Active Directory Users and Computers.
  2. Right-click the icon next to Active Directory Users and Computers, and then click Connect to Domain Controller.NOTE: If you are not on the domain controller where you want to transfer the role ,you need to take this step. It is not necessary if you are connected to the domain controller whose role you want to transfer.
  3. Click the domain controller which will be the new role holder, and then click OK.
  4. Right-click Active Directory Users and Computers icon, and then click Operation Masters.
  5. In the Change Operations Master dialog box, click the appropriate tab (RIDPDC, or Infrastructure) for the role you want to transfer.
  6. Click Change in the Change Operations Master dialog box.
  7. Click OK to confirm that you want to transfer the role.
  8. Click OK.
  9. Click Cancel to close the dialog box.

 

Transferring the Domain Naming Master role

  1. Click Start, point to Programs, point to Administrative Tools, and then click Active Directory Domains and Trusts.
  2. Right-click the Active Directory Domains and Trusts icon, and then click Connect to Domain Controller.NOTE: If you are not on the domain controller where you want to transfer the role ,you need to take this step. It is not necessary if you are connected to the domain controller whose role you want to transfer.
  3. click the domain controller that will be the new role holder, and then click OK.
  4. Right-click Active Directory Domains and Trusts, and then click Operation Masters.
  5. In the Change Operations Master dialog box, click Change.
  6. Click OK to confirm that you want to transfer the role.
  7. Click OK.
  8. Click Cancel to close the dialog box.

 

Transferring the Schema Master Role

You can use the Schema Master tool to transfer the role. However, the Schmmgmt.dll dynamic-link library must be registered in order to make the Schema tool available as an MMC snap-in.

Registering the Schema Tool

  1. Click Start, and then click Run.
  2. Type regsvr32 schmmgmt.dll, and then click OK. A message should be displayed stating that the registration was successful.

 

Transferring the Schema Master Role

  1. Click Start, click run, type mmc, and then click OK.
  2. On the Console, menu click Add/Remove Snap-in.
  3. Click Add.
  4. Click Active Directory Schema.
  5. Click Add.
  6. Click Close to close the Add Standalone Snap-in dialog box.
  7. Click OK to add the snap-in to the console.
  8. Right-click the Active Directory Schema icon, and then click Change Domain Controller.NOTE: If you are not on the domain controller where you want to transfer the role ,you need to take this step. It is not necessary if you are connected to the domain controller whose role you want to transfer.
  9. Click Specify Domain Controller, type the name of the domain controller that will be the new role holder, and then clickOK.
  10. Right-click Active Directory Schema, and then click Operation Masters.
  11. In the Change Schema Master dialog box, click Change.
  12. Click OK.
  13. Click OK .
  14. Click Cancel to close the dialog box.

Source: http://support.microsoft.com/kb/255690