Once logged in into the AWI the Release Automation perspective is not available.
Release : 10.5
Component : RELEASE MANAGER
Within IIS the 'Default Web Site' pointing to %SystemDrive%\inetpub\wwwroot was setup as CDA pointing to the C:\Automic\Release.Manager\WebUI directory. CDA was created as web site and not as application.
CDA was renamed to 'Default Web Site' and CDA was added as application pointing to:
IIS needs a restart after this change.
Once done the Release Automation perspective is available again.