Intel Setup and Configuration Software (SCS) 12.0 now defaults to TLS 1.1 to encrypt communications with Intel AMT. The TLS 1.0 protocol has identified security vulnerabilities, including CVE-2011-3389 and CVE-2014-3566.
The Remote Configuraiton Service (RCS) communicates with AMT systems using TLS 1.1 for configuration, unconfiguration and maintenance operations. To continue to manage legacy AMT systems, you must opt in for TLS 1.0 support (or add it). With SCS 12.0, the RCS will first attempt to connect using TLS version 1.1 and only if AMT system supports TLS 1.0 will it use that version.
You can enable TLS 1.0 protocol support to enable backwards compatibility (for devices running Intel® AMT version 7.0 and newer only) optionally during installation/upgrade of the Remote Configuration Server (RCS) and after installation.
During installation the "Support for Transport Layer Security (TLS) Protocol 1.0" check box can be selected (not enabled by default). After pressing Next you will have to confirm that you want to enable TLS 1.0 protocol support.
If you are running Intel SCS 12.0 and experience provisioning errors such as "***********Exit with code 75. Details: Failed to complete remote configuration of this Intel(R) AMT device" when provisioning older AMT devices, check the following registry entry on the system running the RCS:
Restart the RCSServer service to ensure it rechecks the value of this key.
Please reference the Intel® Setup and Configuration Software (Intel® SCS) User Guide for additional information
Intel® Manageability Commander 2.0 has also removed TLS 1.0 protocol support and will only support connections to device running Intel® AMT version 7.0 and newer only.
Download Intel® Manageability Commander version 2.0.245
If you need to remotely manage older AMT devices (than version 7.0) then an earlier version of Intel® Manageability Commander is available (not sure for how long though!)
Download Intel® Manageability Commander version 1.08
Finally AMT 12.0 firmware support for TLS 1.0 has been removed and in TLS 1.2 support has been added its place.