After installing Aria Automation/Orchestrator 8.18.1 Cumulative Update #2, SRM sites no longer display in the Orchestrator inventory under the SRM plugin.
VMware Aria Automation 8.18.1 Cumulative Update #2
VMware Aria Orchestrator 8.18.1 Cumulative Update #2
VMware Aria Automation Orchestrator Plug-In for VMware Live Site Recovery 9.0.1.
This issue is caused by security hardening implemented with the release of Cumulative Update #2.
Restore Aria Orchestrator (Automation, if using embedded Orchestrator), to the pre-update 2 version, as current versions of the SRM plugin are not compatible with Cumulative Update #2.
A new version of the Orchestrator Plug-In for VMware Live Site Recovery (SRM) will be released with compatibility with Aria Automation Orchestrator 8.18.1 Cumulative Update #2.