diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
index b78b645cf1aa..b6a0482a6dab 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/datafactory.json
@@ -4048,7 +4048,7 @@
             "in": "body",
             "required": true,
             "schema": {
-              "$ref": "#/definitions/ManagedIdentityCredentialResource"
+              "$ref": "#/definitions/CredentialResource"
             }
           }
         ],
@@ -4056,7 +4056,7 @@
           "200": {
             "description": "OK.",
             "schema": {
-              "$ref": "#/definitions/ManagedIdentityCredentialResource"
+              "$ref": "#/definitions/CredentialResource"
             }
           },
           "default": {
@@ -4106,7 +4106,7 @@
           "200": {
             "description": "OK.",
             "schema": {
-              "$ref": "#/definitions/ManagedIdentityCredentialResource"
+              "$ref": "#/definitions/CredentialResource"
             }
           },
           "304": {
@@ -7645,7 +7645,7 @@
           "type": "array",
           "description": "List of credentials.",
           "items": {
-            "$ref": "#/definitions/ManagedIdentityCredentialResource"
+            "$ref": "#/definitions/CredentialResource"
           }
         },
         "nextLink": {
@@ -7676,7 +7676,7 @@
       "type": "object",
       "allOf": [
         {
-          "$ref": "#/definitions/SubResource"
+          "$ref": "#/definitions/CredentialResource"
         }
       ],
       "properties": {
@@ -7689,6 +7689,24 @@
         "properties"
       ]
     },
+    "ServicePrincipalCredentialResource": {
+      "description": "Credential resource type.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/CredentialResource"
+        }
+      ],
+      "properties": {
+        "properties": {
+          "$ref": "./entityTypes/Credential.json#/definitions/ServicePrincipalCredential",
+          "description": "Service Principal Credential properties."
+        }
+      },
+      "required": [
+        "properties"
+      ]
+    },
     "ManagedVirtualNetworkListResponse": {
       "description": "A list of managed Virtual Network resources.",
       "type": "object",
diff --git a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Credential.json b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Credential.json
index b0bb7fb53329..310d3519c9da 100644
--- a/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Credential.json
+++ b/specification/datafactory/resource-manager/Microsoft.DataFactory/stable/2018-06-01/entityTypes/Credential.json
@@ -83,14 +83,7 @@
         {
           "$ref": "#/definitions/Credential"
         }
-      ],
-      "properties": {
-        "typeProperties": {
-          "description": "Managed identity credential properties.",
-          "x-ms-client-flatten": true,
-          "$ref": "#/definitions/ManagedIdentityTypeProperties"
-        }
-      }
+      ]
     },
     "ManagedIdentityTypeProperties": {
       "description": "Managed identity type properties.",
@@ -101,6 +94,52 @@
           "description": "The resource id of user assigned managed identity"
         }
       }
+    },
+    "UserAssignedManagedIdentityCredential": {
+      "description": "User Assigned Managed identity credential.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/ManagedIdentityCredential"
+        }
+      ],
+      "properties": {
+        "typeProperties": {
+          "description": "User Assigned Managed identity credential properties.",
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/UserAssignedManagedIdentityTypeProperties"
+        }
+      },
+      "required": [
+        "typeProperties"
+      ]
+    },
+    "UserAssignedManagedIdentityTypeProperties": {
+      "description": "User Assigned Managed identity type properties.",
+      "$ref": "#/definitions/ManagedIdentityTypeProperties",
+      "required": [
+        "resourceId"
+      ]
+    },
+    "SystemAssignedManagedIdentityCredential": {
+      "description": "System Assigned Managed identity credential.",
+      "type": "object",
+      "allOf": [
+        {
+          "$ref": "#/definitions/ManagedIdentityCredential"
+        }
+      ],
+      "properties": {
+        "typeProperties": {
+          "description": "System Assigned Managed identity credential properties.",
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/SystemAssignedManagedIdentityTypeProperties"
+        }
+      }
+    },
+    "SystemAssignedManagedIdentityTypeProperties": {
+      "description": "System Assigned Managed identity type properties.",
+      "$ref": "#/definitions/ManagedIdentityTypeProperties"
     }
   }
 }