[All Hosts] (devx) Clarify optional/required status of icon url elements (#2343)

* [All Hosts] (devx) Clarify optional/required status of icon url elements

* metadata date

* fix link

Author: Rick-Kirkham

docs/manifest/highresolutioniconurl.md

@@ -1,13 +1,17 @@
 ---
 title: HighResolutionIconUrl element in the manifest file
 description: Specifies the URL of the image that is used to represent your Office Add-in in the insertion UX and Office Store on high DPI screens.
-ms.date: 03/30/2021
+ms.date: 09/08/2025
 ms.localizationpriority: medium
 ---
 
 # HighResolutionIconUrl element
 
-Specifies the URL of the image that is used to represent your Office Add-in in the insertion UX and Office Store on high DPI screens.
+Specifies the URL of the image that is used to represent your Office Add-in in the insertion UX, [AppSource](https://appsource.microsoft.com), and the vertical task pane tab bar on high DPI screens.
+
+> [!IMPORTANT]
+> This element, and the [IconUrl](iconurl.md) element, are now required for add-ins distributed in [AppSource](https://appsource.microsoft.com). 
+
 
 **Add-in type:** Content, Task pane, Mail
 

docs/manifest/iconurl.md

@@ -1,14 +1,17 @@
 ---
 title: IconUrl element in the manifest file
 description: The IconUrl element specifies the URL of the image that represents your Office Add-in in the insertion UX, AppSource, and the tab bar.
-ms.date: 06/19/2024
+ms.date: 09/08/2025
 ms.localizationpriority: medium
 ---
 
 # IconUrl element
 
 Specifies the full, absolute URL of the image that is used to represent your Office Add-in in the insertion UX, [AppSource](https://appsource.microsoft.com), and the vertical task pane tab bar.
 
+> [!IMPORTANT]
+> This element, and the [HighResolutionIconUrl](highresolutioniconurl.md) element, are now required for add-ins distributed in [AppSource](https://appsource.microsoft.com). 
+
 **Add-in type:** Content, Task pane, Mail
 
 ## Syntax

docs/manifest/officeapp.md

@@ -1,7 +1,7 @@
 ---
 title: OfficeApp element in the manifest file
 description: The OfficeApp element is the root element of an Office Add-in manifest.
-ms.date: 11/06/2020
+ms.date: 09/08/2025
 ms.localizationpriority: medium
 ---
 
@@ -50,8 +50,8 @@ The **\<OfficeApp\>** element can contain the following child elements depending
 |Element|Content|Mail|TaskPane|
 |:-----|:-----:|:-----:|:-----:|
 |[AlternateId](alternateid.md)|Yes|Yes|Yes|
-|[IconUrl](iconurl.md)|Yes|Yes|Yes|
-|[HighResolutionIconUrl](highresolutioniconurl.md)|Yes|Yes|Yes|
+|[IconUrl](iconurl.md)\*|Yes|Yes|Yes|
+|[HighResolutionIconUrl](highresolutioniconurl.md)\*|Yes|Yes|Yes|
 |[SupportUrl](supporturl.md)|Yes|Yes|Yes|
 |[AppDomains](appdomains.md)|Yes|Yes|Yes|
 |[Hosts](hosts.md)|Yes|Yes|Yes|
@@ -63,6 +63,10 @@ The **\<OfficeApp\>** element can contain the following child elements depending
 |[VersionOverrides](versionoverrides.md)|Yes|Yes|Yes|
 |[ExtendedOverrides](extendedoverrides.md)|No|No|Yes|
 
+> 
+> [!IMPORTANT]
+> \*  The [IconUrl](iconurl.md) and [HighResolutionIconUrl](highresolutioniconurl.md) elements are formally optional, but are now required for add-ins distributed in [AppSource](https://appsource.microsoft.com).
+
 ## Attributes
 
 |Attribute|Description|