Thanks a lot for your intervention.
Be sure that we will carefully respond to it.
There is just one question that would require some guidance, I think, to be answer properly.
“How many total active certificates do you expect to need at any given time? Across how many different domains? *”
We are a hosting company, so we have our main domain with quite a few subdomains, including one per Plesk server that would need a certificate each.
Then we have our customers domains, loads of domains. Our customers can can generate a certificate whenever they want for their domain using Plesk, or, we might just generate one per domain (with www. and webmail. subdomains) at some point to make sure that nobody misses HTTPS’ availability. All that being done on a large amounts of servers and IPs.
(Though I cannot publicly give the numbers, I will of course do it into the form.)
What is the short answer that I should give to this question? What numbers really matters?