Attempting to clean up (delete) old Sub CA cert and it's issued certs.
The cert won't delete because its in use by legacy OpenVPN which has since been removed from WebUI.
So apparently the legacy OpenVPN configuration has remained. When I switched long time ago I believe I had just disabled the legacy OpenVPN servers.
Does this now require some manual edits of XML config and import?
What's simplest way to purge legacy OpenVPN config to free up certs for deletion?