Security
CAA
Abbreviation for Certification Authority Authorization
In short and in plain language
CAA is a type of record for a domain name.
With it, the owner says who may issue certificates for the domain.
This can help limit ones made by a stranger or by mistake. If you change your provider, you should update the record.
Definition
CAA is a record type in the Domain Name System with which a domain owner states which certificate authorities may issue certificates for it. It can help limit foreign or accidental issuance. When changing certificate providers, the record should be adjusted.