CertifyTheWeb while IIS is behind Nginx reverse proxy?

I use CloudFlare for mostly domain registration and DNS management. The main reason why I would have the proxy is to keep from needing a ton of IPs. Basically I am going to have one IIS server and then a NextCloud server. But thanks for the advice. I will definitely see what I come up with. I don’t think it will happen until next month, though. I will probably write a blog post about it.