diff --git a/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/FailoverManagedInstance.json b/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/FailoverManagedInstance.json
new file mode 100644
index 000000000000..e3e1bc6bf7c3
--- /dev/null
+++ b/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/FailoverManagedInstance.json
@@ -0,0 +1,172 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "version": "2018-06-01-preview",
+    "title": "SqlManagementClient",
+    "description": "The Azure SQL Database management API provides a RESTful set of web APIs that interact with Azure SQL Database services to manage your databases. The API enables users to create, retrieve, update, and delete databases, servers, and other entities."
+  },
+  "host": "management.azure.com",
+  "schemes": [
+    "https"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "produces": [
+    "application/json"
+  ],
+  "paths": {
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.Sql/managedInstances/{managedInstanceName}/failover": {
+      "post": {
+        "tags": [
+          "FailoverManagedInstances"
+        ],
+        "description": "Failovers a managed instance",
+        "operationId": "ManagedInstances_Failover",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ResourceGroupParameter"
+          },
+          {
+            "$ref": "#/parameters/ManagedInstanceNameParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "name": "replicaType",
+            "in": "query",
+            "description": "The type of replica to be failed over.",
+            "required": false,
+            "type": "string",
+            "enum": [
+              "Primary",
+              "ReadableSecondary"
+            ],
+            "x-ms-enum": {
+              "name": "ReplicaType",
+              "modelAsString": true
+            }
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "Successfully completed managed instance failover."
+          },
+          "202": {
+            "description": "Managed instance failover in progress."
+          },
+          "default": {
+            "description": "*** Error Responses: ***\n\n * 404 SubscriptionDoesNotHaveServer - The requested server was not found\n\n * 404 ServerNotInSubscriptionResourceGroup - Specified server does not exist in the specified resource group and subscription.\n\n * 400 ManagementServiceFeatureDisabled - User attempted to use a feature which is disabled.\n\n * 400 ManagedInstanceFailoverThrottled - There was a recent failover on the managed instance.\n\n * 400 ManagedInstanceFailoverNotSupportedOnSKU - This type of customer initiated failover is not supported on the given SKU.\n\n * 409 ManagedInstanceNotInStateToFailover - The managed instance is currently in a state such that failover cannot be issued."
+          }
+        },
+        "x-ms-long-running-operation": true,
+        "x-ms-examples": {
+          "Failover a managed instance": {
+            "$ref": "./examples/FailoverManagedInstance"
+          }
+        }
+      }
+    }
+  },
+  "definitions": {},
+  "parameters": {
+    "SubscriptionIdParameter": {
+      "name": "subscriptionId",
+      "in": "path",
+      "description": "The subscription ID that identifies an Azure subscription.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "client"
+    },
+    "ApiVersionParameter": {
+      "name": "api-version",
+      "in": "query",
+      "description": "The API version to use for the request.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "client"
+    },
+    "ResourceGroupParameter": {
+      "name": "resourceGroupName",
+      "in": "path",
+      "description": "The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "ServerNameParameter": {
+      "name": "serverName",
+      "in": "path",
+      "description": "The name of the server.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "ManagedInstanceNameParameter": {
+      "name": "managedInstanceName",
+      "in": "path",
+      "description": "The name of the managed instance.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "DatabaseNameParameter": {
+      "name": "databaseName",
+      "in": "path",
+      "description": "The name of the database.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "BlobAuditingPolicyNameParameter": {
+      "name": "blobAuditingPolicyName",
+      "in": "path",
+      "description": "The name of the blob auditing policy.",
+      "required": true,
+      "type": "string",
+      "enum": [
+        "default"
+      ],
+      "x-ms-parameter-location": "method"
+    },
+    "SqlVirtualMachineInstanceNameParameter": {
+      "name": "sqlVirtualMachineInstanceName",
+      "in": "path",
+      "description": "The name of the SqlVirtualMachineInstance.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "SqlVirtualMachineContainerNameParameter": {
+      "name": "sqlVirtualMachineContainerName",
+      "in": "path",
+      "description": "The name of the SqlVirtualMachineContainer.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "VirtualClusterNameParameter": {
+      "name": "virtualClusterName",
+      "in": "path",
+      "description": "The name of the virtual cluster.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    }
+  },
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "description": "Azure Active Directory OAuth2 Flow",
+      "flow": "implicit",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  }
+}
diff --git a/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/examples/FailoverManagedInstance.json b/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/examples/FailoverManagedInstance.json
new file mode 100644
index 000000000000..f5c660c2233a
--- /dev/null
+++ b/specification/sql/resource-manager/Microsoft.Sql/preview/2019-06-01-preview/examples/FailoverManagedInstance.json
@@ -0,0 +1,13 @@
+{
+  "parameters": {
+    "subscriptionId": "00000000-1111-2222-3333-444444444444",
+    "resourceGroupName": "testrg",
+    "managedInstanceName": "testinstance",
+    "replicaType": "Primary",
+    "api-version": "2019-06-01-preview"
+  },
+  "responses": {
+    "200": {},
+    "202": {}
+  }
+}