You may receive an alert using Monitor Solution that the agent is not connected. When you connect to the server question you notice that everything seems OK. You may even restart the service and notice the agent now shows OK in the console
ITMS 8.7 RU 1
AeXMetricProv.exe process is using too much memory impacting the functionality of the agent.
This has been resolve in a post cumulative point fix. Please see Monitor Solution point fix section: CUMULATIVE POST ITMS 8.7.1 POINT FIXES