See https://docs.opsmanager.mongodb.com/current/tutorial/install-automation-agent-with-rpm-package/

There should be a new section entitled "Enabling service on system start" or similar.

It should be made clear to the user that the service will not auto-start, but that a command like

sudo systemctl enable mongodb-mms-automation-agent

or

sudo chkconfig mongodb-mms-automation-agent on

needs to be run to enable the service on system start. This has caused confusion with users moving to Ops Manager.