You have noticed that some of your Linux client have stopped receiving update policies and does not appear in your compliance reports.
ITMS 8.5, 8.6, 8.7
One of the criteria to evaluate a client machine is its Linux OS dataclass (you can check that by opening Resource Manager for that client machine).
Missing information in this dataclass will stop client from receiving updates:
This problem may occur if computer is deleted from the SMP console and while computer restores itself back during next basic inventory, client will not report this dataclass anymore, unless reinstalled.
Try the following on your SMP Server Console:
Next time a client machine will report desired inventory back to server.