exchange 2010 支持的exchange组织模式支持以下四种模式
1/ Pure Exchange 14
2/ Mixed Exchange 14 and Exchange 2007 Service Pack 2
3/ Mixed Exchange 14 and Exchange 2003 Service Pack 2
4/; Mixed Exchange 14, Exchange 2007 Service Pack 2 and Exchange 2003 Service Pack 2
如果exchange 2010安装的时候检测到当前环境部满足，会停止安装。
以上，exchange 2010 可以与现有的exchange 2003混存。这也为推进用户的升级和平稳升级提供了便利。
下列是受支持的混存状态
Scenario
Internet Facing Site
Non-Internet Facing Site
1 Exchange 14 Exchange 2007
2Exchange 14 Exchange 2007 and Exchange 14
3 Exchange 2007 and Exchange 14 Exchange 2007
4 Exchange 2007 and Exchange 14 Exchange 2007 and Exchange 14
5 Exchange 2007 and Exchange 14 Exchange 14
下列是不受支持的混存状态:
Scenario
Internet Facing Site
Non-Internet Facing Site
6 Exchange 2007 Exchange 2007 and Exchange 14
7 Exchange 2007 Exchange 14
