Site Scoping
On 1.5 Sites is a plugin you install from FOG Configuration → Plugin System, and it scopes only hosts and users, with no roles or grants. On 1.6 Sites are part of FOG itself: the section is always in the main menu and there is nothing to enable. Upgrading carries existing sites and their members across.
Which version am I on?
Check FOG Configuration → FOG Settings → General → FOG_VERSION in the web UI, or the version string printed at the top of
installfog.sh.