A few months ago, we generated an FQDN certificate host1.example.com, and installed it on that server, along with the Certbot to do on-demand renewal via cron.
Meanwhile, we ended up needing a wild-card certificate for number of other FQDNs, all under example.com, and bought a certificate from a CA.
At some point, the LetsEncrypt cert. reported to had expired (even though it shouldn’t have), and the Certbot wouldn’t renew it, saying no renewal is required. So, instead of bothering to figure out what’s the problem with the host1.example.com certificate, we installed the wild-card cert on that box.
Couple of days ago, we got notification that host1.example.com will expire in 3 weeks.
My question is: How will this LetsEncrypt certificate expiry reflect on our server, now secured with a wild-card cert for example.com, bought from the CA?