Grants one or more permissions on a private CA to the Certificate Manager (ACM) service
acm.amazonaws.com). These permissions allow ACM to issue and
renew ACM certificates that reside in the same Amazon Web Services account as the CA.
If the private CA and the certificates it issues reside in the same
account, you can use
CreatePermission to grant permissions for ACM to
carry out automatic certificate renewals.
For automatic certificate renewal to succeed, the ACM service principal needs permissions to create, retrieve, and list certificates.
If the private CA and the ACM certificates reside in different accounts, then permissions cannot be used to enable automatic renewals. Instead, the ACM certificate owner must set up a resource-based policy to enable cross-account issuance and renewals. For more information, see Using a Resource Based Policy with ACM Private CA.