We are just about to complete the process of replacing all of our Windows 2003 domain controllers with Windows 2008 R2 domain controllers. Once completed, we would then like to raise the domain functional level (of our forest and the domains) from 2003 mixed mode to 2008 native mode.
Our Exchange environment is already on 2010. We have a number of other member servers still running Windows 2003. We also have some Intranet servers and other .NET/IIS applications that us AD for authentication. Finally, our public-facing WEB servers uses the IIS shared config feature and pull configurations from a NAS appliance, again using AD for authentication.
My question is as follows; are there any known issues or risks to be aware of with our servers, particularly the public-facing WEB servers, if/when we raise the Forest/Domain levels to 2008 native mode? Any specific risks, other than the normal risk you take when doing an upgrade?
Thank you.
