I have have multiple site collection in SharePoint online. And I want to search the documents across all the site collections. And searching should work up to subsites as well across all the site collection. Search inside a single site collection is working fine.
Site Collection 1: https://smartcircle.sharepoint.com/sites/Dev1
Site Collection 2: https://smartcircle.sharepoint.com/sites/Dev2
If document A is available in Dev2's subsite. And if I search from Dev1, document A should be get searchable. Can any one please help out me in this scenario? Or please advise does this search is possible across all site collections?