Upon Aria Operations for Logs deployment, SDDC Manager deploys a dedicated agent so SDDC Manager can upload its logs to that Aria Operations for Logs instance. The agent is preconfigured (in SDDC Manager codebase) to use non-ssl communication.
VCF 4.x
VCF 5.x
This is by design.
To enable SSL communication between the preinstalled Aria Operations for Logs (a.k.a. vRealize Log Insight) agent and the Logs product instance in the VCF enabled environment please follow this steps:
ssl_ca_path property in the liagent.ini (i.e. ./var/lib/loginsight-agent/liagent.ini). Also check ssl config in liagent.ini. Configure the VMware Aria Operations for Logs Agent SSL Parameters