Re-Index Document Library or Custom list in SharePoint Online

Here I have explained everything. Whenever we encounter a problem related to Search in SharePoint Online or after searching an item it does not return a result then we must use the following procedure.

• Go to your List in SharePoint where you must search items.
  
  
  
  
• Then go to your List Settings.
  
  
  
  
• Then click on Advanced Settings.
  
  
  
  
• Then click on re-index list.
  
  
  
  
• Then click on re-index list.
  
  
  
  
• Then click the OK button.
  
  
• Then go to your top-level site collection and click Site Settings.
  
  
  
  
• Then click on Search and offline availability under the Search Link.
  
  
  
  
• Then click on re-index site.
  
  
  
  
• Then click the OK button.
  
  
• Then it will take 6-8 hours to propagate the changes.