Hi there @aisyaharifin, I'm not really sure what your use case is or what you're looking for.
Meta engines are engines that consist of multiple, separate indices with similar/equivalent schema. You can read more about these in our meta engine guide. But essentially what this means is that:
You can have one engine for Confluence data
You can have another, different engine for, let's say, SharePoint data
You can combine them both into a single meta engine that searches both Confluence and SharePoint - and any other engines you add to that meta engine.
You can still search each individual engine as well as the meta engine
If you're concerned about limiting access on the staff portal we have documentation guides on DLS for connectors but I'm not sure that's what you're looking for? I think you just want to search the engines?
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