I've edited my text to be more precise. But to elaborate:
Eh! Read what your link says:
> Beginning in Release 12.0, it is possible to globally disable Intel AMT.
It took them 12 versions to put in an off-switch, so only newer hardware even has one. And:
> Intel AMT can be disabled using one of the following methods: Through the MEBX menu: Make sure that Manageability Feature State is disabled, then open the MEBX menu and change the Intel ® AMT option to Disabled. This option can only be reenabled after a reboot.
That only works if your hardware vendor exposes the MEBX menu, which not all vendors do.
> Through an MEI command invoked by OS software: Invoke the CFG_DisableAndClearAMT MEI command.
For that AMT has to be already enabled and configured in the operating system.
Eh! Read what your link says:
> Beginning in Release 12.0, it is possible to globally disable Intel AMT.
It took them 12 versions to put in an off-switch, so only newer hardware even has one. And:
> Intel AMT can be disabled using one of the following methods: Through the MEBX menu: Make sure that Manageability Feature State is disabled, then open the MEBX menu and change the Intel ® AMT option to Disabled. This option can only be reenabled after a reboot.
That only works if your hardware vendor exposes the MEBX menu, which not all vendors do.
> Through an MEI command invoked by OS software: Invoke the CFG_DisableAndClearAMT MEI command.
For that AMT has to be already enabled and configured in the operating system.