<div>
<div class="content wysiwyg-content">
I recently got a new server for my network. &nbsp;I need to make this a domain controller. &nbsp;It is a Windows Server 2003 R2. &nbsp;I went to run dcpromo, did all the normal stuff, and hit next to start installation. &nbsp;I get the error:<br />
<br />
The operation failed because:<br />
<br />
The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003. &nbsp;Use the Adprep command-line tool to prepare both the forest and the domain. For more information about using the Adprep, see Active Directory Help.<br />
<br />
&nbsp;&quot;The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer&quot;<br />
<br />
<br />
So, I say to myself &quot;OK, thats fine&quot; &nbsp;I go to run forestprep on the current DC, and I get &quot;Forestprep already ran, will not rerun&quot;- not exactly that, but along the lines of that.<br />
<br />
I havent ran dcpromo in a very long time....anything Im missing here?
</div>
</div>


I recently got a new server for my network.  I need to make this a domain controller.  It is a Windows Server 2003 R2.  I went to run dcpromo, did all the normal stuff, and hit next to start installation.  I get the error:

The operation failed because:

The Active Directory Installation Wizard cannot continue because the forest is not prepared for installing Windows Server 2003.  Use the Adprep command-line tool to prepare both the forest and the domain. For more information about using the Adprep, see Active Directory Help.

 "The version of the Active Directory schema of the source forest is not compatible with the version of Active Directory on this computer"


So, I say to myself "OK, thats fine"  I go to run forestprep on the current DC, and I get "Forestprep already ran, will not rerun"- not exactly that, but along the lines of that.

I havent ran dcpromo in a very long time....anything Im missing here?

Need help installing AD

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).

Windows Server 2003

The Microsoft Server topic includes all of the legacy versions of the operating system, including the Windows NT 3.1, NT 3.5, NT 4.0 and Windows 2000 and Windows Home Server versions.