Hide entire content sources from Delve (cloud hybrid search scenario)
In a cloud hybrid search scenario, content from on-premises sources also appear in Delve searches. We are aware of the fact that single documents can be hidden from Delve by adding a HideFromDelve column in the content source. For large content sources (>100000 items), however, it would be beneficial if the Office 365 global admin could add a filter that will hide the entire content source from Delve. This would be similar to adding -isExternalContent:1 in the Search Center.