We recently upgraded all of our DCs to Server 2008. Our mail server is Exchange 2003. If we start pushing our forest level up to 2008 will this cause any known issues with the exchange server? It is server 2003 SP2.

Might want to ask this question in Exchange forum for definitive answers. http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/threadsI do not represent the organisation I work for, all the opinions expressed here are my own. This posting is provided "AS IS" with no warranties or guarantees and confers no rights. - .... .- -. -.- ... --..-- ... .- -. - --- ... ....

I will do that. Thank you.

As far as i know there wont be any issues :)Regards, Nidhin.CK

Hi, Exchange Server 2003 is not supported in Active Directory environments whose domain/forest functional levels have been raised beyond Windows Server 2003. However, Exchange Server 2003 SP2 is supported against Windows Server 2008 Active Directory servers. Similar discussion: http://social.technet.microsoft.com/Forums/en/exchangesvrdeploy/thread/b8abbd6f-c415-4eaa-b84f-bf67943885ad http://social.technet.microsoft.com/Forums/en-US/exchangesvrgeneral/thread/696d28bc-c269-4931-a7b2-f2d06e34f878Regards, Rafic If you found this post helpful, please give it a "Helpful" vote. If it answered your question, remember to mark it as an "Answer". This posting is provided "AS IS" with no warranties and confers no rights! Always test ANY suggestion in a test environment before implementing!