diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsCreateOrUpdate.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsCreateOrUpdate.json
index 00003c0dbef0..ed54d6ce723e 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsCreateOrUpdate.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsCreateOrUpdate.json
@@ -29,7 +29,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     },
@@ -45,7 +46,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     }
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsGet.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsGet.json
index 8d755491a754..0dfd40ac9aa3 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsGet.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsGet.json
@@ -21,7 +21,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     }
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsList.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsList.json
index 0069ede2924b..fd16dbffdb9d 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsList.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolDatabasePrincipalAssignmentsList.json
@@ -22,7 +22,8 @@
               "tenantId": "12345678-1234-1234-1234-123456789123",
               "tenantName": "tenantName",
               "principalName": "TestApp",
-              "provisioningState": "Succeeded"
+              "provisioningState": "Succeeded",
+              "aadObjectId": "98765432-1234-1234-1234-123456789123"
             }
           },
           {
@@ -36,7 +37,8 @@
               "tenantId": "12345678-1234-1234-1234-123456789123",
               "tenantName": "tenantName",
               "principalName": "TestApp",
-              "provisioningState": "Succeeded"
+              "provisioningState": "Succeeded",
+              "aadObjectId": "98765432-1234-1234-1234-123456789123"
             }
           }
         ]
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsCreateOrUpdate.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsCreateOrUpdate.json
index 2db3fc311cdd..a35c5ff5da07 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsCreateOrUpdate.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsCreateOrUpdate.json
@@ -28,7 +28,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     },
@@ -44,7 +45,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     }
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsGet.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsGet.json
index b3889cc2e668..b3715cc4c480 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsGet.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsGet.json
@@ -20,7 +20,8 @@
           "tenantId": "12345678-1234-1234-1234-123456789123",
           "tenantName": "tenantName",
           "principalName": "TestApp",
-          "provisioningState": "Succeeded"
+          "provisioningState": "Succeeded",
+          "aadObjectId": "98765432-1234-1234-1234-123456789123"
         }
       }
     }
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsList.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsList.json
index f3c2b5bf4a5c..fff4c5373c90 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsList.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/examples/KustoPoolPrincipalAssignmentsList.json
@@ -21,7 +21,8 @@
               "tenantId": "12345678-1234-1234-1234-123456789123",
               "tenantName": "tenantName",
               "principalName": "TestApp",
-              "provisioningState": "Succeeded"
+              "provisioningState": "Succeeded",
+              "aadObjectId": "98765432-1234-1234-1234-123456789123"
             }
           },
           {
@@ -35,7 +36,8 @@
               "tenantId": "12345678-1234-1234-1234-123456789123",
               "tenantName": "tenantName",
               "principalName": "TestApp",
-              "provisioningState": "Succeeded"
+              "provisioningState": "Succeeded",
+              "aadObjectId": "98765432-1234-1234-1234-123456789123"
             }
           }
         ]
diff --git a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/kustoPool.json b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/kustoPool.json
index 40f962a6ae77..3e760c042708 100644
--- a/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/kustoPool.json
+++ b/specification/synapse/resource-manager/Microsoft.Synapse/preview/2021-06-01-preview/kustoPool.json
@@ -3595,6 +3595,11 @@
         "provisioningState": {
           "$ref": "#/definitions/ResourceProvisioningState",
           "description": "The provisioned state of the resource."
+        },
+        "aadObjectId": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The service principal object id in AAD (Azure active directory)"
         }
       },
       "description": "A class representing cluster principal property."
@@ -3717,6 +3722,11 @@
         "provisioningState": {
           "$ref": "#/definitions/ResourceProvisioningState",
           "description": "The provisioned state of the resource."
+        },
+        "aadObjectId": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The service principal object id in AAD (Azure active directory)"
         }
       },
       "description": "A class representing database principal property."