Add user or group to web application user policy


Below script to add a group to full control access to all the web-applications in SharePoint farm.
$userOrGroup = "domainROL-G-All-SharePointAdmin-Admin" 
$displayName = "SharePoint Team"

Get-SPWebApplication | foreach { 
    $webApp = $_ 
    $policy = $webApp.Policies.Add($userOrGroup, $displayName) 
    $policyRole = $webApp.PolicyRoles.GetSpecialRole([Microsoft.SharePoint.Administration.SPPolicyRoleType]::FullControl) 
    $policy.PolicyRoleBindings.Add($policyRole) 

    $webApp.Update() 
}
Get-SPWebApplication | foreach { 
    $webApp = $_ 
    $policy = $webApp.Policies.Add($userOrGroup, $displayName) 
    $policyRole = $webApp.PolicyRoles.GetSpecialRole([Microsoft.SharePoint.Administration.SPPolicyRoleType]::FullRead) 
    $policy.PolicyRoleBindings.Add($policyRole) 
    $webApp.Update() 
}