Cobalt Strike adds the ability to manage multiple attack servers at once. When you connect to two or more servers, a switch bar with buttons for each server at the bottom of your window. It’s a lot like using tabs to switch between pages in a web browser. To make use of multiple servers, designate a role for each one. For example: Designate one server for phishing and another for reconnaissance. A phishing attack sent from one server that sends users to a malicious website on another server will show in one report.
Source: https://thehackernews.com/2013/02/distributed-red-team-operations-with.html