Cross site publishing depends on the search to create a
content source and to manage crawling for SharePoint cross-site publishing. In
SharePoint, content source will specify crawling in SharePoint farm. By
default, after creating the search service application content source will be
created in SharePoint farm.
We can re index content source that contains the catalog for
changes to be added to the search index. We can re index the catalog content by
using the steps below,
Navigate the library/list and go to settings page. Click on
Advanced settings in General settings section.
Click on Reindex List link in Advanced Settings Page Reindex
List section. And click on Reindex List to confirm to the catalog to be
reindexed during the next crawl, click on Ok.