How to create a SharePoint Subscription Settings Service application through PowerShell

This example assumes that a managed account for DOMAIN\ManagedAccount already exists. 

$AppPool = New-SPServiceApplicationPool -Name SettingsServiceAppPool -Account (Get-SPManagedAccount DOMAIN\ManagedAccount)

$App = New-SPSubscriptionSettingsServiceApplication -ApplicationPool $appPool -Name SettingsServiceApp -DatabaseName SettingsServiceDB

$proxy = New-SPSubscriptionSettingsServiceApplicationProxy -ServiceApplication $App

Get-SPServiceInstance | where{$_.TypeName -eq "Microsoft SharePoint Foundation Subscription Settings Service"} | Start-SPServiceInstance

This example creates

- an application pool

- a new subscription settings service application

- a subscription settings service application proxy

- and starts the service instance on the local machine.