Remove SharePoint Web Application Policy using PowerShell

Requirement: Remove Web Application Policy using PowerShell

How to remove a web application Policy in SharePoint?
To remove a user or group from SharePoint web application Policy, follow these steps:

• Login to SharePoint Central Administration Site
• Application Management >> Manage Web Applications 
• Select the appropriate web application from the list >> Click on "User Policy" button from the ribbon. 
  
• Now, from the "Policy for Web Application" page, Select the user or group to remove and click on "Delete Selected Users" link
• Confirm the prompt once to remove select accounts from web application Policy.
  

PowerShell to Remove a Web Application Policy in SharePoint:
Here is the PowerShell script to delete a web application policy in SharePoint.

Add-PSSnapin Microsoft.SharePoint.PowerShell -ErrorAction SilentlyContinue

Function Remove-WebAppPolicy($WebAppURL, $Account)
{
    Try {
        Write-host "Removing Account '$Account' from the Web Application '$WebAppURL'..." -f yellow

        #Get the web application
        $WebApp = Get-SPWebApplication $WebAppURL -EA SilentlyContinue

        #Check if web application Exists
        if ($WebApp -eq $null)
        {
            $ErrorMsg = "Web Application " + $WebAppURL + " not found!"
            Throw $ErrorMsg
        }
        #Remove web application Policy
        $Policy = $webApp.Policies.Remove($Account)
        $WebApp.Update()

        Write-host "Web Application Policy Removed Successfully! " -f green
    }

 Catch {
        Write-host -f Red "Error Deleting Web Application Policy:" $_.Exception.Message
    }

} 

#Call the function to remove web application Policy
Remove-WebAppPolicy -WebAppURL "http://intranet.crescent.com/" -Account "i:0#.w|crescent\salaudeen"

To Add a web application policy in SharePoint, use this PowerShell script: SharePoint PowerShell to Add Web Application User Policy