We have a SharePoint Server 2013 search dedicated farm and we're indexing multiple contents such as SharePoint sites and Documentum.
For each content type, we've created a specific result source that targets a specific URL.
In preproduction environment, when we type "*" in the search bar, all indexed content is returned, but in the production environment, only 6 elements are returned.
We've tried to index production content on the preproduction farm and all content has been returned on the search page. In both environments, content indexing is working fine.
What could be the reason that makes production results only show 6 elements on production environment but all the results on preproduction environment?