千万这个词可能用得过了，不过来自Exchange Team的博客已经向大家说明了这一点
http://msexchangeteam.com/archive/2007/08/29/446867.aspx
http://msexchangeteam.com/archive/2004/12/29/343848.aspx
不要去做小白鼠

引用:

Seeing that I work closely with Exchange Support Services group, I have yesterday heard of a 2nd instance where a customer has installed Exchange 2007 SP1 Beta 2 in their production environment.
It seems it is time for a reminder:
If you have access to an Exchange 2007 SP1 build, DO NOT install it into your production environment. Also realize that Exchange 2007 SP1 will extend your Active Directory schema. Just to give you a little bit more information: with our TAP customers, we go through a very specific process to make sure that there are no issues when Beta builds of Exchange are joined into production. Exchange 2007 SP1 is Beta code. As such, it has not been extensively tested in all possible configurations and results of installing it into the existing Organization can lead to unexpected results. We want to strike a balance between releasing early builds so that our customers can see the product and give us feedback and ensuring that our customers have a good experience with the product. When our instructions about an early build being for testing only are ignored, customers can have a bad experience and it makes it harder for us to decide to release early builds because we don't want those situations to happen. What you of course can do, is install Exchange 2007 SP1 in the lab and test it there... you can test coexistence too (meaning, having Exchange 2003 servers in the same Org) but this should be in your labs only. We also provided ability to test-drive Exchange 2007 in other ways. Please be patient. We know that many are waiting for their favorite SP1 features, but it is not the time yet to roll this into production!

简单说一下：
如果你获得了一个Exchange 2007的SP1，请不要将他安装在你的生产环境。同样意识到SP1会对你的AD架构进行扩展。

这里给透露一点点信息：我们使用了一个非常特别的方法来确保已经在生产环境下使用SP1 BETA英文版本Exchange 2007运行起来没有错误。Exchange 2007 SP1只是一个BETA版本，并没有大范围的进行测试，并且我们无法估计到底会产生什么样的错误和后果。

没错了,本身是BETA版,所以不要在生产环境下安装.