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[Outlook] (Smart Alerts) Document property available for preview #2595

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5 changes: 3 additions & 2 deletions docs/requirement-sets/outlook/outlook-requirement-set-preview.md
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@@ -1,7 +1,7 @@
---
title: Outlook add-in API preview requirement set
description: Features and APIs that are currently in preview for Outlook add-ins.
ms.date: 06/23/2026
ms.date: 07/30/2026
ms.topic: whats-new
ms.localizationpriority: medium
---
Expand Down Expand Up @@ -29,7 +29,8 @@ The preview requirement set includes all of the features of [requirement set 1.1

The following features are in preview.

- Extended support for the `errorMessageMarkdown` property of the `event.completed` method to [Smart Alerts](/office/dev/add-ins/outlook/onmessagesend-onappointmentsend-events) add-ins in Outlook on Mac.
- Added a property to the `event.completed` method of [Smart Alerts](/office/dev/add-ins/outlook/onmessagesend-onappointmentsend-events) add-ins to resize the width of the task pane that opens from a button in the dialog.
- Extended support for the `errorMessageMarkdown` property of the `event.completed` method to Smart Alerts add-ins in Outlook on Mac.
- Added a property to get or set whether an appointment is an all-day event.
- Added events to activate an [event-based add-in](/office/dev/add-ins/develop/event-based-activation) on a message in read mode when it contains certain attachment types or custom internet headers.
- Added a property and objects to temporarily set the body or subject displayed in read mode.
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