diff --git a/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-07-14/analysisservices.json b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-07-14/analysisservices.json
index 0786299a8a12..ba1063e6fc6b 100644
--- a/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-07-14/analysisservices.json
+++ b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-07-14/analysisservices.json
@@ -417,6 +417,39 @@
           }
         }
       }
+    },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AnalysisServices/servers/{serverName}/dissociateGateway": {
+      "post": {
+        "description": "Dissociates a Unified Gateway associated with the server.",
+        "tags": [ "Servers" ],
+        "operationId": "Servers_DissociateGateway",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "name": "serverName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-z][a-z0-9]*$",
+            "minLength": 3,
+            "maxLength": 63,
+            "description": "The name of the Analysis Services server. It must be at least 3 characters in length, and no more than 63."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK."
+          }
+        }
+      }
     }
   },
   "definitions": {
diff --git a/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/analysisservices.json b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/analysisservices.json
index 9c6b50d503ca..a24966be5e55 100644
--- a/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/analysisservices.json
+++ b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/analysisservices.json
@@ -445,6 +445,42 @@
         }
       }
     },
+    "/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.AnalysisServices/servers/{serverName}/dissociateGateway": {
+      "post": {
+        "description": "Dissociates a Unified Gateway associated with the server.",
+        "x-ms-examples": {
+          "Get details of a server": { "$ref": "./examples/dissociateGateway.json" }
+        },
+        "tags": [ "Servers" ],
+        "operationId": "Servers_DissociateGateway",
+        "parameters": [
+          {
+            "$ref": "#/parameters/ResourceGroupNameParameter"
+          },
+          {
+            "name": "serverName",
+            "in": "path",
+            "required": true,
+            "type": "string",
+            "pattern": "^[a-z][a-z0-9]*$",
+            "minLength": 3,
+            "maxLength": 63,
+            "description": "The name of the Analysis Services server. It must be at least 3 characters in length, and no more than 63."
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK."
+          }
+        }
+      }
+    },
     "/providers/Microsoft.AnalysisServices/operations": {
       "get": {
         "tags": [
diff --git a/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/examples/dissociateGateway.json b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/examples/dissociateGateway.json
new file mode 100644
index 000000000000..a384cad9c97e
--- /dev/null
+++ b/specification/analysisservices/resource-manager/Microsoft.AnalysisServices/2017-08-01-beta/examples/dissociateGateway.json
@@ -0,0 +1,13 @@
+{
+  "parameters": {
+    "subscriptionId": "613192d7-503f-477a-9cfe-4efc3ee2bd60",
+    "resourceGroupName": "TestRG",
+    "serverName": "azsdktest",
+    "api-version": "2017-08-01-beta"
+  },
+  "responses": {
+    "200": {
+      "headers": {}
+    }
+  }
+}
\ No newline at end of file