We were initially planning on doing a completely hybrid search setup, but it came to our attention that an on-premise index is necessary for a piece of software we utilize.
So now, we have a Cloud SSA which indexes our content for searching in our SPO "intranet", and we have an on-premise index that's utilized internally for internal site collections.
I know you can create a result source for a remote SharePoint, however, since our on-prem has already been crawled and had the content sent to the SPO index, when I use a promoted result block it still shows content from on-premise because it's IN the SPO index ...
I basically don't even want to do that, can I just create a content source for our SPO site collection and crawl it? Is this supported and what's the proper syntax?