I have SCCM 2012 R2 deployed with System Center Endpoint Protection. The majority of PCs are working fine and reporting back to SCCM that SCEP is installed. I have a handful of machines that are not reporting back to SCCM that System Center Endpoint Protection is installed. I've reinstalled SCCM Configuration Manager client and SCEP client, but neither has worked. I need this to work as I have a SCEP Managed Device Collection created and these PCs are not showing up in it so they are not getting all the needed updates. Any ideas on how to force a client to send all installed programs to the SCCM server?