We do all our certificates using Let's Encrypt now, which is important because we run a lot of sites and can generate them on demand when they are needed. But because of that, our load balancer cannot do anything more than basic round robin routing as it cannot decode the requests (our sites are full time SSL now).

So to support more powerful routing, we would like the load balancer to support importing certificates we generate using Let's Encrypt, perhaps some kind of API call we can call over to when the certificates are generated to install them on the load balancer when we also install them into IIS.