Windows 2008 Server ADPREP detected that the domain is not in native mode

Posted by shands on Sunday, July 12, 2009 · Leave a Comment

I’ve done a few 2000 / 2003 domain migrations now to 2008 server – but recently hit across one where (when issuing adprep /domain prep) I got the error:

Adprep detected that the domain is not in native mode

Rather irritatingly, it doesn’t say how to put it into native mode – but it is a very simple operation:

On a domain controller, fire up Active Directory Domains and Trusts. Right-click on your domain and select Raise Domain Functional Level. From the drop-down list box, select Windows 2000 Native and click Raise.

You’ll get a message indicating that the functional level was raised successfully. As you’ve probably already clicked ‘OK’ – it also mentioned that it may take some time to replicate the change to other domain controllers. If ADPREP still complains – then you know why! Go make yourself a coffee!

Did you find this hint useful? Are you looking to learn more? Well, here’s a few books that I’ve found useful – have a goosie!