What if I have most of the servers in Ex 2003 and just 2 in Ex 2000? Can I upgrade to Ex 2010 with this scenario?

I don't know why no one answered this thread. The answer is NO...you can't install Exchange 2010 if you have Exchange 2000 in the environment. Migrate all the Mailboxes from 2000 to 2003 and decommission 2000 server. Once you completed the decom, you are ready to install Exchange 2010. Cheers, Gulab | MCITP: Exchange 2010-2007 | Lync Server 2010 | Windows Server 2008 | Skype: Exchange.Ranger | Blog: www.ExchangeRanger.Blogspot.com

I don't know why no one answered this thread. The answer is NO...you can't install Exchange 2010 if you have Exchange 2000 in the environment. Migrate all the Mailboxes from 2000 to 2003 and decommission 2000 server. Once you completed the decom, you are ready to install Exchange 2010. Cheers, Gulab | MCITP: Exchange 2010-2007 | Lync Server 2010 | Windows Server 2008 | Skype: Exchange.Ranger | Blog: www.ExchangeRanger.Blogspot.com

Hi, You can't upgrade an existing Exchange 2000 organization directly to Exchange 2010. You must first upgrade the Exchange 2000 organization to either an Exchange 2003 or Exchange 2007 organization, and then you can upgrade the Exchange 2003 or Exchange 2007 organization to Exchange 2010. We recommend that you upgrade your organization from Exchange 2000 to Exchange 2003, and then upgrade from Exchange 2003 to Exchange 2010. http://technet.microsoft.com/en-us/library/aa998604.aspxPlease 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.

Hi, You can't upgrade an existing Exchange 2000 organization directly to Exchange 2010. You must first upgrade the Exchange 2000 organization to either an Exchange 2003 or Exchange 2007 organization, and then you can upgrade the Exchange 2003 or Exchange 2007 organization to Exchange 2010. We recommend that you upgrade your organization from Exchange 2000 to Exchange 2003, and then upgrade from Exchange 2003 to Exchange 2010. http://technet.microsoft.com/en-us/library/aa998604.aspxPlease 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.