diff --git a/schemas/2021-12-01-preview/Microsoft.Workloads.json b/schemas/2021-12-01-preview/Microsoft.Workloads.json
index 9467346f43..45450ae507 100644
--- a/schemas/2021-12-01-preview/Microsoft.Workloads.json
+++ b/schemas/2021-12-01-preview/Microsoft.Workloads.json
@@ -1082,6 +1082,25 @@
       "properties": {},
       "description": "Defines the SAP Enqueue Server properties."
     },
+    "ExternalInstallationSoftwareConfiguration": {
+      "type": "object",
+      "properties": {
+        "centralServerVmId": {
+          "type": "string",
+          "description": "The resource ID of the virtual machine containing the central server instance."
+        },
+        "softwareInstallationType": {
+          "type": "string",
+          "enum": [
+            "External"
+          ]
+        }
+      },
+      "required": [
+        "softwareInstallationType"
+      ],
+      "description": "The SAP Software configuration Input when the software is installed externally outside the service."
+    },
     "FileshareProfile": {
       "type": "object",
       "properties": {
@@ -2746,6 +2765,9 @@
         },
         {
           "$ref": "#/definitions/SAPInstallWithoutOSConfigSoftwareConfiguration"
+        },
+        {
+          "$ref": "#/definitions/ExternalInstallationSoftwareConfiguration"
         }
       ],
       "properties": {},