I need to generate a ssl certifcate from a CSR that someone give to me, with let's encrypt. it's for a subdomain (sub.maindomain.com) that i own but this subdomain has a A cname to another server that don't belong to me. I want to run a cloud app on this subdomain. Also, i'v already a ssl certificate for my main domain (maindomain.com).
how do i do that ?
Maybe it's not possible with let's encrypt module inside virtualmin but in command shell it's surely possible i guess ?
Thanks to help me