1. Configure the Subscription Settings service application and proxy:  You can do so by running the following commands in the SharePoint 2013 Management Shell (PowerShell) – examples below assume you are using the VM downloaded through my blog post:
1. $account = Get-SPManagedAccount “<farm account>”
   • Where: <farm account> is the name of the Farm administrators account in the SharePoint farm
   • Example: $account = Get-SPManagedAccount “sp_farm”
2. $appPoolSubSvc = New-SPServiceApplicationPool -Name SettingsServiceAppPool -Account $account
3. $appSubSvc = New-SPSubscriptionSettingsServiceApplication –ApplicationPool $appPoolSubSvc –Name SettingsServiceApp –DatabaseName <SettingsServiceDB>
   • Where: <SettingsServiceDB> is the name that you’d like to give to the new Subscription Settings Service database that the above command will create
   • Example: $appSubSvc = New-SPSubscriptionSettingsServiceApplication –ApplicationPool $appPoolSubSvc –Name SettingsServiceApp –DatabaseName App_SubscriptionSettingsService
4. $proxySubSvc = New-SPSubscriptionSettingsServiceApplicationProxy –ServiceApplication $appSubSvc
2. Configure the App Management service application and proxy:  You can do so by running the following commands in  SharePoint 2013 Management Shell (PowerShell) - again, examples below assume you are using the VM downloaded through my blog post:
   1. $account = Get-SPManagedAccount “<farm account>”
      • Where: <farm account> is the name of the Farm administrators account in the SharePoint farm
      • Example: $account = Get-SPManagedAccount “sp_farm”
   2. $appPoolAppSvc = New-SPServiceApplicationPool -Name AppServiceAppPool -Account $account
   3. $appAppSvc = New-SPAppManagementServiceApplication -ApplicationPool $appPoolAppSvc -Name AppServiceApp -DatabaseName <AppServiceDB>
      • Where: <AppServiceDB> is the name that you’d like to give to the new App Management Service database that the above command will create
      • Example: $appSubSvc = New-SPSubscriptionSettingsServiceApplication –ApplicationPool $appPoolSubSvc –Name SettingsServiceApp –DatabaseName App_AppManagmentService
   4. $proxyAppSvc = New-SPAppManagementServiceApplicationProxy -ServiceApplication $appAppSvc