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.

PowerShell
$userOrGroup = "domain\ROL-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() 
}