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How does AutoSSL work? What processes does AutoSSL undergo when installing a certificate?
During account/domain creation, (or sub/addon creation), autossl will run and verify if an SSL already exists. If not, it will generate DNS (CNAME) entries in DNS Zone (if hosted on same server or cluster) and use HTTP as a fallback for DCV checks and then sends an order to our store which in turn sends to Sectigo (or Let's Encrypt if installed).
Then Sectigo will start processing the order and perform DCV checks.
Upon verification, an SSL certificate is issued and our store checks to see if one exists. If so, it then installs it.
For general information on managing AutoSSL on cPanel servers, see the following article.