how to restrict cross web application search

Question

I have several web application in SharePoint 2016. Now if any site collection admin add search result web part, by default is show result from other web application as well.

I want to change the search setting to be limited to current site collection only. How can I achieve it !

Answer 1

• Edit Search Results Page
• Edit the Search Results Web Part.
• In the Web Part tool pane, in the Search Criteria section, click Change query.

• On the BASICS tab > At Query Text > add the below query to scope the search results for one web application based on its URL.

  {?{searchTerms} PATH://yourwebapplicationURL}
  

For more details check Configure properties of the Search Results Web Part in SharePoint Server

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[Update]

You have the following options

1. Create a Query rule with a block result with the above query, check the details steps at Manage query rules in SharePoint Server

2. Create a Search Result Source in the site collection and use it in your search web part.

   • Site collection setting > Site Collection Administration > Search Result Source > add the above query.

   • in your search result web part, use this search result source.