The SharePoint redirect site you configured for the News Central acts as a page that ensures a secure and seamless authorization process between Staffbase and SharePoint platforms. Users get search results from all sites to which they have access. Since the redirect site is used only for authorization, you can exclude it from search results.
Navigate to Site settings on the SharePoint redirect site you configured for the News Central.
The Site Settings page opens.
Click Search and Offline Availability.
Select No for the question Allow this site to appear in search results?
You have excluded the redirect site from appearing in search results.