You would need to create a new cert-manager Issuer that uses the ACME process:
https://cert-manager.io/docs/configuration/acme/Then specify it as the issuer in the cert-manager-provided-ingress-certificate.yaml example found in $deploy/sas-bases/examples/security. There is a README.md file in that path too that talks more about that file.
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Greg Wootton | Principal Systems Technical Support Engineer