Plug in the network cable, power cable, and turn on your Intel AMT 3.0 or later computer. The Intel AMT device sends its certificate hashes to the OOB site server computer (by default, the Notification Server computer). Then, Intel SCS authenticates to the Intel AMT device with a certificate chain that includes a trusted root certificate matching one of the received hashes (you can view the certificate's hash on the certificate's Details tab, in the Thumbprint field). After that, the Intel AMT device checks the hashes and the DNS suffix in the certificate, and goes through the setup and configuration process.
After you plugged in an Intel AMT computer for the first time, it sends Hello messages to the OOB site server computer (by default, the Notification Server computer) only for the first 24 hours. If the computer was not set up and configured during that time (due to Intel SCS unavailable, or network problems), you must make the Intel AMT device to resend Hello messages.
To start the remote configuration process on computers with Intel AMT 2.2 and 2.6, you must use the Delayed Configuration policy. Only Intel AMT versions 3.0 and later support bare-metal remote configuration where no management agent and no running operating system are required.