[office-js-preview] (Outlook) Update delay delivery API guidance (DefinitelyTyped#65333)

* Update delay delivery API guidance

* Fixes the getAsync definition

Author: samantharamon

types/office-js-preview/index.d.ts

@@ -13056,11 +13056,12 @@ declare namespace Office {
          * @param options - 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 function.
          * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter,
-         *                `asyncResult`, which is an `Office.AsyncResult` object.
+         *                `asyncResult`, which is an `Office.AsyncResult` object. The delivery date and time of a message is returned in the
+         *                `asyncResult.value` property. If a delivery date hasn't been set on a message yet, `0` is returned instead.
          *
          * @beta
          */
-        getAsync(options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<Date>) => void): void;
+        getAsync(options: Office.AsyncContextOptions, callback?: (asyncResult: Office.AsyncResult<Date | 0>) => void): void;
         /**
          * Gets the delivery date and time of a message.
          *
@@ -13072,11 +13073,12 @@ declare namespace Office {
          * **{@link https://learn.microsoft.com/office/dev/add-ins/outlook/outlook-add-ins-overview#extension-points | Applicable Outlook mode}**: Compose
          *
          * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter,
-         *                `asyncResult`, which is an `Office.AsyncResult` object.
+         *                `asyncResult`, which is an `Office.AsyncResult` object. The delivery date and time of a message is returned in the
+         *                `asyncResult.value` property. If a delivery date hasn't been set on a message yet, `0` is returned instead.
          *
          * @beta
          */
-        getAsync(callback?: (asyncResult: Office.AsyncResult<Date>) => void): void;
+        getAsync(callback?: (asyncResult: Office.AsyncResult<Date | 0>) => void): void;
         /**
          * Sets the delivery date and time of a message.
          *
@@ -13087,11 +13089,15 @@ declare namespace Office {
          *
          * **{@link https://learn.microsoft.com/office/dev/add-ins/outlook/outlook-add-ins-overview#extension-points | Applicable Outlook mode}**: Compose
          *
+         * **Errors**:
+         *
+         * - `InvalidFormatError` - The format of the specified data object is not valid.
+         *
          * @param datetime - The future date and time when the message should be sent.
          * @param options - 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 function.
-         * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter
-         *                             of type Office.AsyncResult. Any errors encountered will be provided in the `asyncResult.error` property.
+         * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter,
+         *                `asyncResult`, which is an `Office.AsyncResult` object. Any errors encountered will be provided in the `asyncResult.error` property.
          *
          * @beta
          */
@@ -13106,9 +13112,13 @@ declare namespace Office {
          *
          * **{@link https://learn.microsoft.com/office/dev/add-ins/outlook/outlook-add-ins-overview#extension-points | Applicable Outlook mode}**: Compose
          *
+         * **Errors**:
+         *
+         * - `InvalidFormatError` - The format of the specified data object is not valid.
+         *
          * @param datetime - The future date and time when the message should be sent.
-         * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter
-         *                             of type Office.AsyncResult. Any errors encountered will be provided in the `asyncResult.error` property.
+         * @param callback - Optional. When the method completes, the function passed in the `callback` parameter is called with a single parameter,
+         *                `asyncResult`, which is an `Office.AsyncResult` object. Any errors encountered will be provided in the `asyncResult.error` property.
          *
          * @beta
          */