I can't seem to find the level of our Exchange organization. I need to know if the organization is Exchange 2000 or Exchange 2003. I know that the operation mode is "Mixed Mode (can support pre-Exchange 2000 Servers)" We have only two exchange server in our organization and both servers are Version 6.5 (Build 7638.2: ServicePack 2) --> That is Exchange server 2003. We think that we once started our exchange organization with an exchange 2000 server and added an exchange server 2003 later. The objectVersion of our organization is 6903. Could it be that when you run forestprep and domainprep before adding an exchange 2003 server "upgrades" your organization to exchange 2003. Background: We are installing a new server with windows server 2008. We have an windows 2000 AD in native mode. With a windows 2000 DC, windows 2003 DC and now also a windows 2008 DC. We want to know what version of Exchange to install on our new windows 2008 server.

Hi Bernard, If you take a look at this page it should help explain which versions of Exchange are supported on different Windows versions, it will also show what forest and domain functional level you need to use with each version of Exchange/Windows aswell.My blog: http://www.monkeydust.net | Twitter: http://www.twitter.com/MrYiff

Thanks for your information, but it doesn't answer my question and it does not include Exchange 2010. I want to know what version / level my Exchange organization is.

This page may help if thats what you are after (for general versions anyway). If you want to know what forest/domain functional level is needed to run Exchange 2010 then both need to be at at least 2003 level - see this page for more detailed requirements. If neither of these links of any use then you may need to clarify exactly what you are wanting to know :)My blog: http://www.monkeydust.net | Twitter: http://www.twitter.com/MrYiff

Hi, This may help u: http://support.microsoft.com/kb/158530 Build numbers and release dates for Exchange Server It includes the build numbers and Exchange Version/Edition name for it. It also includes Ex2010. Regards, Laeeq Qazi|Team Lead(Exchange + Sharepoint + BES + DynamicsCRM) www.HostingController.com

Hi, These pages tell me the version and editions of the servers, but not the version of the Exchange organization. (Maybe the version of the Exchange Organization is only the version of the AD schema, but I want to be sure.)

Hi,If you want to know the mode of your Exchange Organization (mixed or native), then open ESM on your Exchange 2003 Server, right click your Org name at the top, Properties, and it will be clearly shown under Operation Mode - like you already stated you have done.If you have Exchange 2003 - your Schema has clearly been prepped for Exchange 2003.If you have Exchange 2000 servers still, then you cannot move to Exchange 2003 native mode until you have removed them.If you are planning on deploying Exchange Server on Windows 2008 then only Exchange 2007 SP1 and Exchange 2010 are supported.You can have Exchange 2000, 2003 and 2007 in co-existence mode.You can have Exchange 2003, 2007 and 2010 in co-existence mode.I hope this makes things clearer. You have actually answered your own question without realising it I believe.OliverOliver Moazzezi | Exchange MVP, MCSA:M, MCTS:Exchange 2010, BA (Hons) Anim | http://www.exchange2007.com | http://www.exchange2010.com | http://www.cobweb.com |

Thanks Oliver. This is way I needed to know: Since we currently only have Exchange 2003 servers, we could install Exchange 2010 on the new server. But we still have one DC on windows 2000, have to install Exchange 2007 SP1 or upgrade that domain controller to at least windows server 2003. So there is no version / level in an Exchange organization. There are the versions of exchange that can co-exist.