diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index f2047ce098..40e6e457a8 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -4227,6 +4227,7 @@ declare namespace Office {
      *
      * The Settings object is automatically loaded as part of the Document object, and is available by calling the settings property of that object 
      * when the add-in is activated. 
+     * 
      * The developer is responsible for calling the saveAsync method after adding or deleting settings to save the settings in the document.
      */
     interface Settings {
@@ -4244,7 +4245,7 @@ declare namespace Office {
          * You can add multiple event handlers for the specified eventType as long as the name of each event handler function is unique.
          *
          * @param eventType Specifies the type of event to add. Required.
-         * @param handler The event handler function to add. Required.
+         * @param handler The event handler function to add, whose only parameter is of type {@link Office.SettingsChangedEventArgs}. Required.
          * @param options Provides an option for preserving context data of any type, unchanged, for use in a callback.
          * @param callback Optional. A function that is invoked when the callback returns, whose only parameter is of type {@link Office.AsyncResult}.
          * 
@@ -4535,6 +4536,48 @@ declare namespace Office {
          */
         set(name: string, value: any): void;
     }
+    /**
+     * Provides information about the settings that raised the settingsChanged event.
+     * 
+     * @remarks
+     * <table><tr><td>Requirement Sets</td><td>Settings</td></tr></table>
+     * 
+     * To add an event handler for the settingsChanged event, use the addHandlerAsync method of the Settings object.
+     * 
+     * The settingsChanged event fires only when your add-in's script calls the Settings.saveAsync method to persist the in-memory copy of the settings into the document file. 
+     * The settingsChanged event is not triggered when the Settings.set or Settings.remove methods are called.
+     * 
+     * The settingsChanged event was designed to let you to handle potential conflicts when two or more users are attempting to save settings at the same time when your add-in is used in a shared (co-authored) document.
+     * 
+     * **Important:** Your add-in's code can register a handler for the settingsChanged event when the add-in is running with any Excel client, 
+     * but the event will fire only when the add-in is loaded with a spreadsheet that is opened in Excel Online, and more than one user is editing the spreadsheet (co-authoring). 
+     * Therefore, effectively the settingsChanged event is supported only in Excel Online in co-authoring scenarios.
+     * 
+     * **Support details**
+     * 
+     * A capital Y in the following matrix indicates that this interface is supported in the corresponding Office host application. 
+     * An empty cell indicates that the Office host application doesn't support this interface.
+     * 
+     * For more information about Office host application and server requirements, see 
+     * {@link https://docs.microsoft.com/office/dev/add-ins/concepts/requirements-for-running-office-add-ins | Requirements for running Office Add-ins}.
+     * 
+     * *Supported hosts, by platform*
+     *  <table>
+     *   <tr><th>                    </th><th> Office for Windows desktop </th><th> Office Online (in browser) </th><th> Office for iPad </th></tr>
+     *   <tr><td><strong> Excel      </strong></td><td>                            </td><td> Y                          </td><td>                 </td></tr>
+     *   <tr><td><strong> Word       </strong></td><td> Y                          </td><td> Y                          </td><td>                 </td></tr>
+     *  </table>
+     */
+    interface SettingsChangedEventArgs {
+        /**
+         * Gets an {@link Office.Settings} object that represents the settings that raised the settingsChanged event.
+         */
+        settings: Settings;
+        /**
+         * Get an {@link Office.EventType} enumeration value that identifies the kind of event that was raised.
+         */
+        type: EventType;
+    }
     /**
      * Represents a slice of a document file.
      *