Add new section

Author: Nkrb

powerapps-docs/developer/model-driven-apps/clientapi/reference/Xrm-WebApi/updateRecord.md

@@ -163,7 +163,51 @@ Xrm.WebApi.offline.updateRecord("account", "5531d753-95af-e711-a94e-000d3a11e605
     }
 );
 ```
- 
+### Update associations to the related entities of type Activity
+
+To update association to the related entities of type Activity, set the value of single-valued navigation properties using the `@odata.bind` annotation to another record.
+
+**Update Opportunity field on task**
+
+```JavaScript
+// define the data to update a record
+var data =
+    {
+        "[email protected]": "/opportunities(61a0e5b9-88df-e311-b8e5-6c3be5a8b200)"
+    }
+// update the record
+Xrm.WebApi.updateRecord("task", "5531d753-95af-e711-a94e-000d3a11e605", data).then(
+    function success(result) {
+        console.log("Task updated");
+        // perform operations on record update
+    },
+    function (error) {
+        console.log(error.message);
+        // handle error conditions
+    }
+);
+```
+**Update Regarding field on task**
+
+ ```JavaScript
+// define the data to update a record
+var data =
+    {
+        "[email protected]": "/accounts(61a0e5b9-88df-e311-b8e5-6c3be5a8b200)"
+    }
+// update the record
+Xrm.WebApi.updateRecord("task", "5531d753-95af-e711-a94e-000d3a11e605", data).then(
+    function success(result) {
+        console.log("Task updated");
+        // perform operations on record update
+    },
+    function (error) {
+        console.log(error.message);
+        // handle error conditions
+    }
+);
+```
+
 ### Related topics
 
 [Xrm.WebApi](../xrm-webapi.md)