packer.json

{
  "variables": {
    "ADOServicePrincipalAppId": "",
    "ADOServicePrincipalSecret": "",
    "TenantId": "",
    "SubscriptionId": "",

    "ImageDestRG": "",    
    "TempResourceGroup": "",

    "VirtualNetwork": "",
    "VirtualNetworkRG": "",
    "Subnet": "",

    "Location": "",
    "VMSize": "",

    "StorageAccountInstallersName": "",
    "StorageAccountInstallersKey": "",
    "StorageAccountInstallersPath": "",

    "ImagePublisher":"MicrosoftWindowsDesktop",
    "ImageOffer":"office-365",
    "ImageSku":"19h2-evd-o365pp",

    "Build_DefinitionName": "{{env `Build_DefinitionName`}}",
    "Build_BuildNumber": "{{env `Build_BuildNumber`}}"
  },
  "builders": [
    {
      "type": "azure-arm",
        
      "client_id": "{{user `ADOServicePrincipalAppId`}}",
      "client_secret": "{{user `ADOServicePrincipalSecret`}}",
      "tenant_id": "{{user `TenantId`}}",
      "subscription_id": "{{user `SubscriptionId`}}",

      "os_type": "Windows",
      "managed_image_name": "{{user `Build_DefinitionName`}}-{{isotime \"2006-01-02-1504\"}}-Build{{user `Build_BuildNumber`}}",
      "managed_image_resource_group_name": "{{user `ImageDestRG`}}",
      "temp_resource_group_name": "{{user `TempResourceGroup`}}",

      "image_publisher": "{{user `ImagePublisher`}}",
      "image_offer": "{{user `ImageOffer`}}",
      "image_sku": "{{user `ImageSku`}}",
      "communicator": "winrm",
      "winrm_use_ssl": "true",
      "winrm_insecure": "true",
      "winrm_timeout": "30m",
      "winrm_username": "packer",

      "virtual_network_name": "{{user `VirtualNetwork`}}",
      "virtual_network_subnet_name": "{{user `Subnet`}}",
      "virtual_network_resource_group_name": "{{user `VirtualNetworkRG`}}",
      "private_virtual_network_with_public_ip": "True",
      "azure_tags": {
        "Image Publisher": "{{user `ImagePublisher`}}",
        "Image Offer": "{{user `ImageOffer`}}",
        "Image SKU": "{{user `ImageSku`}}"
      },

      "location": "{{user `Location`}}",
      "vm_size": "{{user `VMSize`}}",

      "async_resourcegroup_delete":true
    }
  ],
  "provisioners": [
    {
      "type": "powershell",
      "inline": [
          "$ErrorActionPreference='Stop'",

          "Import-Module -Name Smbshare -Force -Scope Local",
          "$Usr='AzureAD\\'+\"{{user `StorageAccountInstallersName`}}\"",
          "New-SmbMapping -LocalPath Z: -RemotePath \"{{user `StorageAccountInstallersPath`}}\" -Username \"$Usr\" -Password \"{{user `StorageAccountInstallersKey`}}\"",
          "Write-Host \"'Z:' drive mapped\""
      ]
    },
    {
      "type": "WindowsUpdate",
      "searchCriteria": "IsInstalled=0",
      "filters": [
        "exclude:$_.Title -like 'Preview'",
        "include:$true"
      ],
      "updateLimit": 20
    }
    {
      "type": "powershell",
      "script": "install_apps.ps1"
    },
    {
      "type": "powershell",
      "script": "sysprep.ps1"
    }
  ]
}