Understanding automated certificate options

Update 2026-08-05: Added DNS-PERSIST-01 challenge option. &#xA; In April 2025, CA/B Forum ballot SC-081v3 &#xA;was passed &#xA;to reduce the maximum certificate validity to 47 days by the 15th of March 2029.&#xA;The first step will be to reduce the maximum validity period to 200 days by the 15th of March 2026. &#xA; There has been a great deal of debate on whether this will be useful or, in some…