diff --git a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/createBasicAmlCompute.json b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/createBasicAmlCompute.json
index 2b86de3166dd..4e1e97364eb7 100644
--- a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/createBasicAmlCompute.json
+++ b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/createBasicAmlCompute.json
@@ -12,6 +12,10 @@
         "properties": {
           "vmSize": "STANDARD_NC6",
           "vmPriority": "Dedicated",
+          "osType": "Windows",
+          "virtualMachineImage": {
+            "id": "/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/myResourceGroup/providers/Microsoft.Compute/galleries/myImageGallery/images/myImageDefinition/versions/0.0.1"
+          },
           "scaleSettings": {
             "maxNodeCount": 1,
             "minNodeCount": 0,
diff --git a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/getAmlCompute.json b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/getAmlCompute.json
index c6efff9527d6..43bec81a15fb 100644
--- a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/getAmlCompute.json
+++ b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/examples/getAmlCompute.json
@@ -21,6 +21,8 @@
           "properties": {
             "vmSize": "STANDARD_NC6",
             "vmPriority": "Dedicated",
+            "osType": "Windows",
+            "virtualMachineImage": null,
             "subnet": "test-subnet-resource-id",
             "scaleSettings": {
               "maxNodeCount": 1,
diff --git a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/machineLearningServices.json b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/machineLearningServices.json
index 8aca4853c4b1..1d2e9855d69e 100644
--- a/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/machineLearningServices.json
+++ b/specification/machinelearningservices/resource-manager/Microsoft.MachineLearningServices/preview/2020-05-15-preview/machineLearningServices.json
@@ -2251,6 +2251,18 @@
               "description": "AML Compute properties",
               "type": "object",
               "properties": {
+                "osType": {
+                  "description": "Compute OS Type",
+                  "type": "string",
+                  "enum": [
+                    "Linux",
+                    "Windows"
+                  ],
+                  "x-ms-enum": {
+                    "name": "OsType",
+                    "modelAsString": true
+                  }
+                },
                 "vmSize": {
                   "description": "Virtual Machine Size",
                   "type": "string"
@@ -2267,6 +2279,10 @@
                     "modelAsString": true
                   }
                 },
+                "virtualMachineImage": {
+                  "description": "Virtual Machine image for AML Compute - windows only",
+                  "$ref": "#/definitions/VirtualMachineImage"
+                },
                 "scaleSettings": {
                   "description": "Scale settings for AML Compute",
                   "$ref": "#/definitions/ScaleSettings"
@@ -2610,6 +2626,19 @@
         "maxNodeCount"
       ]
     },
+    "VirtualMachineImage": {
+      "type": "object",
+      "description": "Virtual Machine image for Windows AML Compute",
+      "properties": {
+        "id": {
+          "description": "Virtual Machine image path",
+          "type": "string"
+        }
+      },
+      "required": [
+        "id"
+      ]
+    },
     "NodeStateCounts": {
       "properties": {
         "idleNodeCount": {