SCCM 2012 Integration Kit does not allow installation on CAS (Central Administration Site)

[David_Baur]

The Central Administration Site Role is a Top Tier Role in Configuration Manager 2012 design to manage Replications and provide top level administration. It is very odd that the tool does not allow you to install it there where it should be...it only allows an install on a primary site....and since those that have a CAS site don't use reporting at lower level sites in many cases we also see the issue where reporting fails to install...why? becuase the SSRS is on the CAS, not on a Primary Site. Whomever designed this needs to please fix the following:

 Let it install on the CAS. A Primary is valid, but not more so than a CAS.