My IP address changed when my ISP swapped out equipment so I need to renew all my certificates. With certbot this was a breeze, but I have NO CLUE on how to do it with acme. Any ideas?
Certificates are not tied to your old IP address; if you change server ip address, you must update DNS to the new ip address, and when a certificate is renewed next time it will use the ip address advertised in DNS to connect to. Pretty much the same as with certbot, there is a cronjob that runs and renews them. If renewal is failing, follow the letsencrypt error faq to diagnose why.
