@bnewsond the dashboard is available to all registered users, not just paid users (it just so happens that the register link assumes you want to purchase a license). You can register directly through the app when you Add to Dashboard.
The dashboard UI will receive reports from all registered servers on your account as and when they request/renew certificates (if enabled).
Currently there is no centralised command-and-control style behaviour
(i.e. you can’t use the dashboard to tell one of your servers what to do, they just report to it). This is a possibility for the future but needs careful consideration regarding the security implications and communications requirements. We could certainly offer a central dashboard server product that you host internally if there was enough interest. I think once you get to that stage a lot of people are probably also talking about monitoring/controlling linux & windows servers together, which is obviously more work.
As an aside, user feedback on the dashboard (which is much appreciated) has been very sparse until recently, so it’s interesting that we seem to be getting more frequent enquiries from a few parties but I don’t really know what’s changed to cause that.