Ravi:
To followup on what Troy said, please review the following install doc:
https://support.ca.com/cadocs/1/CA%20eHealth%206%203%203-ENU/Bookshelf_Files/PDF/ehealth_installation_enu.pdf
Specifically ch2 where there is a section on Installation Guidelines and Prerequisites
Note, in the bookshelf, it states "Important! All updated information is captured in the CA eHealth 6.3.3 Readme. The guide content is unchanged from the CA eHealth Release 6.3.2 bookshelf."
... so the ehealth documentation is not changing - it is the readme that is updated