And if so, has anyone done it?
From AWS blog:
"ACM Private CA offers a secure, managed infrastructure to support the issuance and revocation of private digital certificates. It supports RSA and ECDSA key types for CA keys used for the creation of new certificates, as well as certificate revocation lists (CRLs) to inform clients when a certificate should no longer be trusted. Currently, ACM Private CA does not offer root CA support."
I would imagine the "does not offer root CA support" would mean it can't be used with Splunk, right?
Do you have an update on the problem? I am attempting to do the same now.