[Outlook] (unified manifest) Update client support (#5062)

* Add support note

* Add support note to applicable articles

Author: samantharamon

docs/outlook/delegate-access.md

@@ -1,7 +1,7 @@
 ---
 title: Implement shared folders and shared mailbox scenarios in an Outlook add-in
 description: Discusses how to configure Outlook add-in support for shared folders (also known as delegate access) and shared mailboxes.
-ms.date: 02/20/2025
+ms.date: 02/25/2025
 ms.topic: how-to
 ms.localizationpriority: medium
 ---
@@ -116,10 +116,13 @@ To learn more about where add-ins do and don't activate in general, refer to the
 
 ## Configure the manifest
 
-To implement shared folders and shared mailbox scenarios in your add-in, you must first configure support for the feature in your manifest. The markup varies depending on the type of manifest your add-in uses.
+To implement shared folder and shared mailbox scenarios in your add-in, you must first configure support for the feature in your manifest. The markup varies depending on the type of manifest your add-in uses.
 
 # [Unified manifest for Microsoft 365](#tab/jsonmanifest)
 
+> [!NOTE]
+> Implementing shared folder and shared mailbox scenarios with a unified manifest for Microsoft 365 is currently only supported in classic Outlook on Windows. For other supported platforms, use the add-in only manifest instead.
+
 Add an additional object to the "authorization.permissions.resourceSpecific" array and set its "name" property to "Mailbox.SharedFolder".
 
 ```json

docs/outlook/item-multi-select.md

@@ -1,7 +1,7 @@
 ---
 title: Activate your Outlook add-in on multiple messages
 description: Learn how to activate your Outlook add-in when multiple messages are selected.
-ms.date: 01/07/2025
+ms.date: 02/25/2025
 ms.topic: how-to
 ms.localizationpriority: medium
 ---
@@ -23,6 +23,9 @@ Complete the [Outlook quick start](../quickstarts/outlook-quickstart-yo.md) to c
 
 # [Unified manifest for Microsoft 365](#tab/jsonmanifest)
 
+> [!NOTE]
+> Implementing the item multi-select feature with a unified manifest for Microsoft 365 is currently only supported in classic Outlook on Windows. For other supported platforms, use the add-in only manifest instead.
+
 1. In your preferred code editor, open the Outlook quick start project you created.
 
 1. Open the **manifest.json** file located at the root of the project.