I apologize but I am not clear about push agent.
If the push agent is failed then I am not sure how the machine is showing Managed. I will suggest to look at KB#:KB56386 for environmental requirement.
For best practice of EEPC 6.x, please look at KBs#: https://kc.mcafee.com/resources/sites/MCAFEE/content/live/PRODUCT_DOCUMENTATION/ 22000/PD22865/en_US/eepc_6.0_patch2_best_practice_guide_en-us.pdf and https://kc.mcafee.com/resources/sites/MCAFEE/content/live/PRODUCT_DOCUMENTATION/ 23000/PD23081/en_US/eepc_610_best_practice_guide_en-us.pdf.
I'm glad to seen your response with usefull information given. I hope through this link, I be able to find my answer.
let catch up again other day.....