Installing Exchange 2010 SP1 on Windows Server 2008 R2 has been such an easy process except for the part of installing the prerequisite hotfixes. Though the TechNet documentation (http://technet.microsoft.com/en-us/library/bb691354.aspx) has all the hotfixes listed, wouldn't it be great if we could have all these incorporated into the base Operating System itself.
I was excited to know that Windows 2008 R2 SP1 includes the hotfixes required to install Exchange 2010 SP1 (listed in Exchange 2010 SP1 FAQ and Known Issues — 979744, 983440, 979099, 982867 and 977020). If you're installing Exchange 2010 SP1 on a server running Windows 2008 R2 SP1, you don't need to install these hotfixes separately.
Cool isn't it?
Also note that the Exchange Team has completed testing with Windows 2008 R2 SP1 and the following versions of Exchange are supported to run on Windows 2008 R2 SP1 (the RTM version of SP1):
I normally prefer the automated way of installing the prerequisites by using the script created by Bhargav Shukla and Pat Richard which can be grabbed from the link below:
Now that's what called Automation! :-)