There are Exchange 2000 Servers in the Forest
[This topic is intended to address a specific issue called out by the Exchange Server Analyzer Tool. You should apply it only to systems that have had the Exchange Server Analyzer Tool run against them and are experiencing that specific issue. The Exchange Server Analyzer Tool, available as a free download, remotely collects configuration data from each server in the topology and automatically analyzes the data. The resulting report details important configuration issues, potential problems, and nondefault product settings. By following these recommendations, you can achieve better performance, scalability, reliability, and uptime. For more information about the tool or to download the latest versions, see "Microsoft Exchange Analyzers" at http://go.microsoft.com/fwlink/?linkid=34707.]
Topic Last Modified: 2009-02-20
Exchange Server 2010 setup cannot continue because there are Exchange 2000 Server servers in the forest.
Exchange 2010 requires that all Exchange servers in the forest be running Exchange Server 2003 or later.
To address this error, upgrade the Exchange 2000 server to Exchange 2003 or later, or remove the Exchange 2000 servers from the forest and then rerun setup.
For more information on upgrading the Exchange 2000 server to Exchange 2003 or later, see the following exchange server resources: