Exchange pre-requisites: Net. Tcp Port Sharing

Another pre-requisite for Exchange 2010 is to set the Net. Tcp Port sharing.

You can either do this with:

1) services.msc (go to start menu, run services.msc then click on Net. Tcp Port Sharing to enable it)

or

2) Powershell commands: Set-Service NetTcpPortSharing -StartupType Automatic

PS: The mastering of windows powershell is recommended to run smoothly Exchange 2007 and 2010. 

I believe that MS products will emphasize more in windows scripting within the next few years.

What does Net. Tcp Port Sharing do? It allows many applications to share the same port without configuring a client. More here