How to Enable Client Integration in SharePoint 2013?

Client integration setting in SharePoint enables or disables SharePoint-Client applications integration, such as starting client application based on the document types. It also provides features such as Open in Explorer view, Upload multiple documents, Edit in datasheet, etc.

Enable client integration in SharePoint 2013 central administration
SharePoint client integration is not enabled in forms authentication, by default. To activate client integration in SharePoint, follow these steps:

• Go to SharePoint 2013 Central Administration >> Application Management >> Click on "Manage Web Applications" under Web Applications.
• Select your target web application for which you would like to enable or disable client integration.
• Click on "Authentication Providers" button from the ribbon.
  
• Click on the Zone name - Default in the "Authentication Providers" popup.
  
• In the edit authentication providers page, under "Client Integration" section, Set "Enable Client Integration?" setting to "Yes".
  
  
• Click Save to commit your changes.

SharePoint permission to use client integration features:
Although the client integration is enabled or disabled at web application level, in order to utilize client integration features, user must be granted with "Use Client Integration Features" permission from his/her permission level.

• From site settings >> Click on Site Permissions >>Click on Permission Levels button from the ribbon
• Pick the permission level granted to the user, such as "Edit" or some other custom permission level
• You'll see list of base permissions associated with the particular permission level. Under Site Permissions, make sure "Use Client Integration Features" is selected.
  

SharePoint 2013 enable-disable client integration using PowerShell:
In some cases, you may have to disable client integration feature in SharePoint.

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

#Configuration parameters
$WebAppURL="http://intranet.crescent.com/"
$Zone="Default"
$ClientIntegrationOption=$False

#Get the web application and current setting
$WebApp = Get-SPWebApplication $WebAppURL
$webApp.IisSettings[$Zone].EnableClientIntegration

#enable or disable client integration
$webApp.IisSettings[$Zone].EnableClientIntegration = $ClientIntegrationOption
$WebApp.Update()

Based on the option you specified in the $ClientIngrationOption flag, it either enables or disables client integration feature.