Many thanks for the reply.
Actually, I want Agent and EES to get automatically installed on any computers that joins ERA.
Please consider this scenario:
I have created a Static Group Synchronization that syncs ERA with the Active Directory every day. Consequently computers are being moved to the group selected in the Static Group Synchronization task. The reason I asked that question is because I wanted the installation is being done by Agent Deployment and Software Install tasks automatically once a computer joins the ERA.
Based on your explanation it seems I should manually move new computers to groups that Agent Deployment and related Software Install tasks are assigned to them.
Thanks again.