diff --git a/docs/Trouble Shooting Guides/tsg-scripts/subscriberCreationRegisterService.ps1 b/docs/Trouble Shooting Guides/tsg-scripts/subscriberCreationRegisterService.ps1
index db589506a9925295f12e1456651437fe6401064d..aac8f5dd624d3e08b7d781cf57c7d007d85f2c52 100644
--- a/docs/Trouble Shooting Guides/tsg-scripts/subscriberCreationRegisterService.ps1	
+++ b/docs/Trouble Shooting Guides/tsg-scripts/subscriberCreationRegisterService.ps1	
@@ -1,8 +1,9 @@
+# Elevated permissions are required for running these commands.
 $myWebhookAadTenantId = "<Your Webhook's Azure AD tenant id>"
 
 Connect-AzureAD -TenantId $myWebhookAadTenantId
 
-# This is the "Azure Event Grid" Azure Active Directory (AAD) AppId
+# This is the "Azure Event Grid" Azure Active Directory (AAD) AppId. Don't change this value.
 $eventGridAppId = "4962773b-9cdb-44cf-a8bf-237846a00ab7"
 
 # Create the "Azure Event Grid" AAD Application service principal if it doesn't exist
@@ -66,8 +67,8 @@ Write-Host $myAppRoles
 #####################################################
 
 
-# This is the app id of the application which will create event subscription. Set to $null if you are not assigning the role to app.
-#$eventSubscriptionWriterAppId = "<the app id of the application which will create event subscription>"
+# This is the app id of the application which will create event subscription. Set to $null if you are not assigning the role to app. app-dev-sp-username in common resource keyvault contains this values.
+$eventSubscriptionWriterAppId = "<the app id of the application which will create event subscription>"
 
 $myServicePrincipal = Get-AzureADServicePrincipal -Filter ("appId eq '" + $myApp.AppId + "'")
 
@@ -80,4 +81,4 @@ New-AzureADServiceAppRoleAssignment -Id $eventGridAppRole.Id -ResourceId $myServ
 
 Write-Host "My Webhook's Azure AD Tenant Id:  $myWebhookAadTenantId"
 Write-Host "My Webhook's Azure AD Application Id: $($myApp.AppId)"
-Write-Host "My Webhook's Azure AD Application ObjectId Id$($myApp.ObjectId)"
\ No newline at end of file
+Write-Host "My Webhook's Azure AD Application ObjectId Id$($myApp.ObjectId)"