Using PowerShell script to change a web application's authentication to claims mode

Open PowerShell command window and execute the script below:

$webApp = Get-SPWebApplication "http://mywebapp"
$webApp.UseClaimsAuthentication = "True";
$webApp.Update();
$webApp.ProvisionGlobally();

Once the script has executed, navigate to your web app’s authentication provider settings:



Under Zone click on Default and select your identity provider for claims based authentication: