If the AMT HECI drivers have been installed on these computers then after 24 hours of being on the network the AMT port would be closed. I do not believe SCCM agent can handle the "Delayed" provision of AMT. i.e. to re-open the AMT port for provisioning. I believe this is the problem you are experiencing here.
Try running the Activator on the client you are experiencing the issue to reopen the AMT port. Follow-up and Refresh machine policies on the client so the client can get the Auto provision policy as soon as possible and trigger provisioning.
Replace "sccmfqdn" in the command below with the FQDN of your sccm server and the slash at the end of the name is important. This command will create a log file to show the setup and configuration "in-process". You will also see hello packets directed at the sccm server. Although hello packets are ignored the installed agent will trigger provisioning.
Activator /s https://sccmfqdn/ https://sccmfqdn/ /h /c
Download activator utility from here:
http://software.intel.com/en-us/articles/intel-vpro-technology-activator-utility/ http://software.intel.com/en-us/articles/intel-vpro-technology-activator-utility/
Activator will open the port for 6 hours. However, SCCM agent sets OTP (default) once every 24 hours so if these two windows do not match you might still have a challenge. Other may have some more ideas.
