Firewall component is not installed on Endpoints

Hi,

I have SEPM 12.1.4 running in my environment of 3500+ Endpoints. The previous SEP Administrator didn't installed SEP Firewall component on Endpoints.Now there is requirement from Management to enable Firewall components on all the Endpoints.

What are the options available through which i can now install and enable Firewall components on Endpoints? Which one is the best and most optimal among them?

Thanks.