SQL Server discovery issue

Thought I'd left a reply covering the solution, but apparently it didn't save. It was some sort of permissions issue, only resolved by making the service account used by ScienceLogic PowerShell account a local admin. A message in the Windows Security Event Log indicated it was due to not having "Act as part of the operating system" rights, but those rights weren't sufficient. I suspect some sort of Group Policy interfering with things, but without knowing exactly what rights the service account is expected to have and the rats nest of GPOs, I don't have time to dig further.