Once you done with the security/Hardening the host
1. Right Click on the Host -> Host profile-> create host profile.
2. Now through VC -> Host Profile -> Created Host poofile Attached to all host and scan for the "Compliance" ->
Now look for all the info is listed which you want to apply to all host . If correct you can apply the profile and reboot the host.
before that i would suggest you to read little about host profile . That will help you to understand what setting you can change through the host profile
http://www.vmware.com/files/pdf/techpaper/VMW-Host-Profiles-Tech-Overview.pdf