@BlakeRichardson just checking back on this one. It looks like the event log for systems manager clients is available under the Network-wide > Event log page... But you get that event log page only when looking at a security appliance page for example. So if you have an MX status page pulled up, if you hover over the network-wide section, you see the event log tab, but not when you are on any of the System manager pages. Once there, you could pull up the event log for security appliances, or for clients. You see similar behavior? If something's still off I'd give Support a ring.