If you are using FEP 2010 you might see these messages in your ConfigMgr environment:
FEP 2010 has a monitoring service that checks for new events every 2 minutes. That process generates the 30102 and 30103 status messages but it doesn't record what component is generating the event (as shown above). So, you'll see lots of 'Unknown Machine', 'Unknown SMS Application', 'User "UNKNOWN"' type of activity in the status messages. This scenario doesn't cause any issues, it just makes understanding these messages difficult if you don't know what application is generating these messages.