Precision 3630 missing bios settings (Intel AMT/ MEBX menu)

I am looking at disabling Intel Active Management (Intel AMT) on my Precision 3630 Tower however the setting seems to be missing in BIOS (I am currently running the latest Bios version 2.16.0). Ignoring the Bios option it also looks like Intel AMT can be disabled via the MEBx menu however to enable booting into the MEBx menu you have to select an option under the missing Intel AMT BIOS setting so I am stuck in a loop.