The minimum OS user permissions needed for a user in order to create a PowerShell host connection.
VMware vRealize Automation 8.x
WORKAROUND:
This depends on authentication settings and permissions the account has in the windows. It is not mandatory to be domain admin.
If the shared session mode is used, the account should have rights to run scripts on the host and needed rights that any script needs to do its job.
The PowerShell host credentials must belong to a member of the local administrators group.
https://docs.vmware.com/en/VMware-Aria-Automation/8.18/Using-Automation-Orchestrator-Plugins/GUID-88A9A9A1-CF04-401A-AE55-2CF3446643DA.html