Does running forestprep and domain prep twice hurt?

An admin upgrading Active Directory from Windows 2000 to Windows Server 2003 doesn't know if the previous admin has run adprep/forestprep and adprep/domainprep. He wants to know if it's okay to run forestprep and domainprep a second time.

I am currently running a Windows 2000 Active Directory with two domain controllers. We have another member server running Windows 2003 and Exchange 2003. I am not sure if the previous admin has run adprep/forestprep and adprep/domainprep.

I just purchased two new servers running Windows Server 2003. I would like to promote the new servers to domain...

controllers, move the FSMO, PDC and Masters roles over to the newly promoted DC, and then demote the two Windows 2000 Server DCs.

Is it okay to run forestprep and domainprep even if they were run before setting up Exchange Server? Is it okay to run it a second time? What other things do I need to do to upgrade Active Directory to Windows Server 2003?

You will not cause any harm by re-running forestprep or domainprep if they have already been run against the target domain and forest. You can consult this Microsoft Knowledge Base article for detailed instructions on how to upgrade a Windows 2000 Active Directory to Windows Server 2003.
This was first published in March 2007

Dig Deeper on Windows Server and Network Security



Find more PRO+ content and other member only offers, here.

Have a question for an expert?

Please add a title for your question

Get answers from a TechTarget expert on whatever's puzzling you.

You will be able to add details on the next page.



Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to:









  • VDI assessment guide

    Wait! Don't implement VDI technology until you know your goals and needs. A VDI assessment should consider the benefits of a VDI ...

  • Guide to calculating ROI from VDI

    Calculating ROI from VDI requires a solid VDI cost analysis. Consider ROI calculation models, storage costs and more to determine...

  • Keep the cost of VDI storage under control

    Layering, persona management tools and flash arrays help keep virtual desktop users happy and VDI storage costs down.