Client Management Suite

I'm currently running SMP 7.1 and I'll soon be upgrading to 7.5.  Management wants to begin utilizing Cloud Enabled Mangement on a small group of our machines.  My question is that I'm reading that I have to have them communicate over SSL.  Now reading through some of the white papers I've noticed that the instructions appear to force me to switch all of my current machines over to SSL as well.  Is this true or can I leave the machines on the network alone and allow them to continue to communicate over HTTP or will I be forced to switch all 2000 machines over to HTTPS because of a small group of offsite machines?

In theory you could do both as IIS allows you to have HTTP & HTTPS running at the same time; however, I have seen that if SSL isnt enforced in IIS the clients running over HTTPS will receive HTTP locations, which will probably not work for them as your firewall will no doubt only accept HTTPS traffic..