Here's a question. Can a child Domain who is running 2003 full native function with a parent domain that is upgraded to 2008 R2?

Hi, If all the domain controllers in your parent domain is running Windows Server 2008 R2, you may raise your domain functional level to Windows Server 2008 R2. If you want to raise your forest functional level to Windows Server 2008 R2, you will need to upgrade all the domain controller operating system to Windows Server 2008 R2 and raise domain functional level to Windows Server 2008 R2 for all the domains. For more information, please refer to the following Microsoft TechNet article: Understanding Domain and Forest Functionality http://technet.microsoft.com/en-us/library/cc771294.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, there is no problem with as long as you are not required to raise the forest functional level.Best regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.