I wouldn't touch it, could be some checksum against some of the files, I know for a fact if you edit the authorization.xml file which controls the user access to webAccess + direct VIC before attaching to Virtual Center and adding the "vpxuser" it gives you an error. This causes you to never to be able to successfully attach your ESX Host to Virtual Center.
Though to answer your question, the webAccess configuration should be located in /etc/vmware/webAccees off top of memory