Merge pull request #124487 from wjpigott/patch-6

Update pre-post-prerequisites.md

Author: v-regandowner

articles/update-manager/includes/pre-post-prerequisites.md

@@ -9,8 +9,15 @@ ms.date: 09/24/2024
 
 ## Prerequisites
 
-1. Ensure that you are using PowerShell **7.2** runbook.
-2. Assign permission to managed identities - You can assign permissions to the appropriate [managed identity](../../automation/automation-security-overview.md#managed-identities). The runbook can use either the Automation account system-assigned managed identity or a user-assigned managed identity. 
+1. Ensure that you're using PowerShell **7.4** runbook.
+2. Assign permission to managed identities. You can assign permissions to the appropriate [managed identity](../../automation/automation-security-overview.md#managed-identities). The runbook can use either the Automation account system-assigned managed identity or a user-assigned managed identity.
+
+   For the script examples below (Start VMs and Stop VMs), the Virtual Machine Contributor role is required or a Custom Role with these specific permissions:
+
+   - Microsoft.Compute/virtualMachines/start/action
+   - Microsoft.Compute/virtualMachines/deallocate/action
+   - Microsoft.Compute/virtualMachines/restart/action
+   - Microsoft.Compute/virtualMachines/powerOff/action
 
    You can use either portal or PowerShell cmdlets to assign permissions to each identity:
 
@@ -28,7 +35,7 @@ ms.date: 09/24/2024
                    -ResourceGroupName $resourceGroup `
                    -RoleDefinitionName "Contributor"
     ```        
- 
+
     Assign a role to a user-assigned managed identity.
 
     ```powershell
@@ -38,9 +45,10 @@ ms.date: 09/24/2024
                    -RoleDefinitionName "Contributor"
     ```
     For the system-assigned managed identity, show `ClientId` and record the value for later use.
-        
+
     ```powershell
     $UAMI.ClientId
     ```
   ---
+
 3. Import the `Az.ResourceGraph` module, ensure the module is updated to ThreadJob with the module version 2.0.3.