Defender for Azure Resource Manager is on (Standard tier)

# Enable Microsoft Defender for Azure Resource Manager at Standard tier
resource "azurerm_security_center_subscription_pricing" "<example_resource_name>" {
  tier          = "Standard"   # Critical: enables Standard pricing (ON)
  resource_type = "Arm"        # Critical: targets Defender for Azure Resource Manager
}

// Enable Microsoft Defender for Azure Resource Manager at Standard tier
resource example_pricing 'Microsoft.Security/pricings@2023-01-01' = {
  name: 'Arm'
  properties: {
    pricingTier: 'Standard' // Critical: sets Defender for ARM plan to Standard (ON)
  }
}