diff --git a/types/office-js-preview/index.d.ts b/types/office-js-preview/index.d.ts
index fe260b41b9..80195cf516 100644
--- a/types/office-js-preview/index.d.ts
+++ b/types/office-js-preview/index.d.ts
@@ -12576,7 +12576,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *                      If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -12585,10 +12585,10 @@ declare namespace Office {
          *                      If the field is a text field, an InvalidDataFormat error is returned. 
          *                      If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *                      if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -12608,10 +12608,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
 
     /**
@@ -14269,7 +14269,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *        If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -14278,10 +14278,10 @@ declare namespace Office {
          *        If the field is a text field, an InvalidDataFormat error is returned. 
          *        If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *        if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult. 
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -14301,10 +14301,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult. 
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
     /**
      * The read mode of {@link Office.Item | Office.context.mailbox.item}.
@@ -15570,7 +15570,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *        If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -15578,10 +15578,10 @@ declare namespace Office {
          *        applied in Outlook. If the field is a text field, an InvalidDataFormat error is returned. 
          *        If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *        if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -15601,10 +15601,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
     /**
      * The message read mode of {@link Office.Item | Office.context.mailbox.item}.
@@ -15995,7 +15995,8 @@ declare namespace Office {
          * Adds an event handler for a supported event.
          * 
          * Currently the supported event types are `Office.EventType.AppointmentTimeChanged`, `Office.EventType.RecipientsChanged`, and 
-         * `Office.EventType.RecurrenceChanged`. In Preview, `Office.EventType.AttachmentsChanged` is also supported.
+         * `Office.EventType.RecurrenceChanged`.
+         * In Preview, `Office.EventType.AttachmentsChanged` and `Office.EventType.EnhancedLocationsChanged` are also supported.
          * 
          * [Api set: Mailbox 1.7]
          *
diff --git a/types/office-js/index.d.ts b/types/office-js/index.d.ts
index edae85ea8a..ef05ead31d 100644
--- a/types/office-js/index.d.ts
+++ b/types/office-js/index.d.ts
@@ -12576,7 +12576,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *                      If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -12585,10 +12585,10 @@ declare namespace Office {
          *                      If the field is a text field, an InvalidDataFormat error is returned. 
          *                      If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *                      if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -12608,10 +12608,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
 
     /**
@@ -14269,7 +14269,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *        If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -14278,10 +14278,10 @@ declare namespace Office {
          *        If the field is a text field, an InvalidDataFormat error is returned. 
          *        If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *        if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult. 
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -14301,10 +14301,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult. 
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
     /**
      * The read mode of {@link Office.Item | Office.context.mailbox.item}.
@@ -15570,7 +15570,7 @@ declare namespace Office {
          * 
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param options - An object literal that contains one or more of the following properties.
+         * @param options - Optional. An object literal that contains one or more of the following properties.
          *        asyncContext: Developers can provide any object they wish to access in the callback method.
          *        coercionType: If text, the current style is applied in Outlook Web App and Outlook. 
          *        If the field is an HTML editor, only the text data is inserted, even if the data is HTML. 
@@ -15578,10 +15578,10 @@ declare namespace Office {
          *        applied in Outlook. If the field is a text field, an InvalidDataFormat error is returned. 
          *        If coercionType is not set, the result depends on the field: if the field is HTML then HTML is used; 
          *        if the field is text, then plain text is used.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, options: Office.AsyncContextOptions & CoercionTypeOptions, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, options?: Office.AsyncContextOptions & CoercionTypeOptions, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
         /**
          * Asynchronously inserts data into the body or subject of a message.
          *
@@ -15601,10 +15601,10 @@ declare namespace Office {
          *
          * @param data - The data to be inserted. Data is not to exceed 1,000,000 characters. 
          *             If more than 1,000,000 characters are passed in, an ArgumentOutOfRange exception is thrown.
-         * @param callback - When the method completes, the function passed in the callback parameter is called with a single parameter of 
+         * @param callback - Optional. When the method completes, the function passed in the callback parameter is called with a single parameter of 
          *                 type Office.AsyncResult.
          */
-        setSelectedDataAsync(data: string, callback: (asyncResult: Office.AsyncResult<void>) => void): void;
+        setSelectedDataAsync(data: string, callback?: (asyncResult: Office.AsyncResult<void>) => void): void;
     }
     /**
      * The message read mode of {@link Office.Item | Office.context.mailbox.item}.
@@ -15995,7 +15995,8 @@ declare namespace Office {
          * Adds an event handler for a supported event.
          * 
          * Currently the supported event types are `Office.EventType.AppointmentTimeChanged`, `Office.EventType.RecipientsChanged`, and 
-         * `Office.EventType.RecurrenceChanged`. In Preview, `Office.EventType.AttachmentsChanged` is also supported.
+         * `Office.EventType.RecurrenceChanged`.
+         * In Preview, `Office.EventType.AttachmentsChanged` and `Office.EventType.EnhancedLocationsChanged` are also supported.
          * 
          * [Api set: Mailbox 1.7]
          *