I have EPO 4.6 in a small disconnected network, and it is failing to install agents. I am trying to push about 25 agents down to client machines, and they all fail. The server log in the web GUI has no additional information other than the task expired, the server.log file has no information on the tasks (no logs appear during the time the task was running). All McAfee services started without issue when the server booted.
I spent some time looking at that log. It was logging the installs, it turn out it was not able to initialize the database due to a permissions error. Looking at KB56386, it looks like I had the "Impersonate a client after authentication" attribute set too strictly. I am restarting the server with that attribute loosened - hopefully that will fix the problem.