Hi Guy, I having this problem with dcpromo my Windows 2008 R2 with Windows 2000. Details: Windows 2000 - 1st DC. Windows 2003 - Memeber DC. Windows 2008 R2 - Fail to join as DC. I have adprep with the Windows 2008 R2 disk on the Windwos 2000 Dc, complete without error. Then i join the Windows 2003 as the Member Dc with Windows 2000. But when i try to join Windows 2008 R2 as member DC to the Domain, its fail. Telling me to prep the DC using the Windows 2008 disk. Question: Can Windows 2008 R2 join as Member DC with Windows 2000. Or should i transfer all roles to Windows 2003 1st then join Winodws 2008??? Thanks Simon Hoo

Hello, did you make sure to use the adprep32.exe from the Windows server 2008 R2 disk and NOT the adprep.exe, as this is ONLY for 64bit? See also: http://msmvps.com/blogs/mweber/archive/2010/02/06/upgrading-an-active-directory-domain-from-windows-server-2000-to-windows-server-2008-or-windows-server-2008-r2.aspx Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Hi, Windows Server 2008 R2 includes a 32-bit version and a 64-bit version of Adprep.exe. The 64-bit version runs by default. If you want to run one of the Adprep.exe commands on a 32-bit computer, use the 32-bit version of Adprep.exe (Adprep32.exe). For more information, please refer to the following Microsoft TechNet aritlce: Running Adprep.exe http://technet.microsoft.com/en-us/library/dd464018(v=WS.10).aspx Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hello, for upgrade to AD DS 2008 R2: http://technet.microsoft.com/en-us/library/cc731188(WS.10).aspx If you are using the 2008 R2 install media on a 32 bit OS, run adprep32. If you are using the 2008 R2 install media on a 64 bit OS, run adprep. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator

Hi, Thanks for the reply. Will try that out. My question now is, i had run the adprep.exe from the R2 disk, which is the 64bits version, can i still run the 32bit .exe?? Will the 32bit .exe overwrite or prep the AD again. That mean to say, after running the adprep32.exe, i should be able to join the win2008 R2 as a DC in the Domain, correct.... ThanksSimon Hoo

Hi, Since you ran Adprep X64 on Windows Server 2000 Domain Controller, the result should be failed. The Schema has not been extended successfully and there is no file will be overwritten. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Hello, wrong architecture, no changes, not a problem.Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.