I was recently working with a customer to get the Microsoft Dynamics AX "Enterprise Portal" working correctly in their multi-tier production SharePoint environment. 

We quickly discovered this was not a well-documented or particularly easy task, as Microsoft seems to think everyone will just blindly install this with defaults in a SharePoint Foundation Instance on the AX server itself.  As this isn't a very scalable or common solution, we decided to investigate and find a proper supportable and reproducable way to install EP into a SharePoint 2010 Enterprise environment.