Sample Azure Policy rule to evaluate Windows Client VMs for Azure Hybrid Benefit usage

audit-ahb-vm-windows-client-rule.json

"if": {
  "allOf": [
    {
      "field": "type",
      "equals": "Microsoft.Compute/virtualMachines"
    },
    {
      "field": "Microsoft.Compute/imagePublisher",
      "equals": "MicrosoftWindowsDesktop"
    },
    {
      "field": "Microsoft.Compute/imageOffer",
      "in": "[[parameters('imageOffers')]"
    },
    {
      "field": "Microsoft.Compute/virtualMachines/licenseType",
      "notEquals": "Windows_Client"
    }
  ]
}