[All hosts] (NAA) document NestedAppAuth req set (#2095)

* add nestedappauth req set

* update table

* add builds

* edits

* edits

* fix typo

* edits

* add nestedappauth req set info to articles

* add nestedappauth client info

* fix description

* replace text with link to same

Author: davidchesnut

docs/requirement-sets/common/nested-app-auth-requirement-sets.md

@@ -0,0 +1,45 @@
+---
+title: Nested app auth requirement sets
+description: Nested app auth requirement set information for Office Add-ins.
+ms.date: 10/15/2024
+ms.topic: overview
+ms.localizationpriority: medium
+---
+
+# Nested app auth requirement set
+
+Requirement sets are named groups of API members. Office Add-ins use requirement sets specified in the manifest or use a runtime check to determine whether an Office application supports APIs that an add-in needs. For more information, see [Office versions and requirement sets](/office/dev/add-ins/develop/office-versions-and-requirement-sets).
+
+Office Add-ins run across multiple versions of Office. The following table lists the nested app auth requirement set, the supported Office client applications, and the **minimum** builds or versions for those applications where applicable.
+
+| Requirement set | Office on the web | Office on Windows<ul><li>Microsoft 365 subscription</li><li>retail perpetual</li></ul> | Office on Windows<ul><li>volume-licensed perpetual</li></ul> | Office on Mac | Office on iPad and Outlook on Android |
+|:-----|:-----|:-----|:-----|:-----|:-----|
+| NestedAppAuth 1.1 | Supported | Version 2409 (Build 18025.20000) | not available | Version 16.89 (Build 24090815) | Build v4.2433.0 |
+
+> [!IMPORTANT]
+>
+> - Currently, the NestedAppAuth 1.1 requirement set is supported in Office on the web only for documents that are opened from Microsoft SharePoint Online and OneDrive.
+> - In Outlook, the NestedAppAuth 1.1 requirement set isn't supported if the add-in is loaded in an Outlook.com or Gmail mailbox.
+
+## Outlook and NestedAppAuth requirement set
+
+To require the NestedAppAuth requirement set 1.1 in your Outlook add-in code, check if it's supported by calling `isSetSupported('NestedAppAuth', '1.1')`.
+Declaring it in the Outlook add-in's manifest isn't supported. You can also determine if the API is supported by checking that it's not `undefined`.
+For further details, see [Using APIs from later requirement sets](/javascript/api/requirement-sets/outlook/outlook-api-requirement-sets#using-apis-from-later-requirement-sets).
+
+## Office versions and build numbers
+
+To find out more about versions and build numbers, see:
+
+[!INCLUDE [Links to get Office versions and how to find Office client version](../../includes/links-get-office-versions-builds.md)]
+
+## Office Common API requirement sets
+
+For information about Common API requirement sets, see [Office Common API requirement sets](office-add-in-requirement-sets.md).
+
+## See also
+
+- [Office versions and requirement sets](/office/dev/add-ins/develop/office-versions-and-requirement-sets)
+- [Specify Office applications and API requirements](/office/dev/add-ins/develop/specify-office-hosts-and-api-requirements)
+- [Office Add-ins XML manifest](/office/dev/add-ins/develop/add-in-manifests)
+- [Enable SSO in an Office Add-in using nested app authentication](/office/dev/add-ins/develop/enable-nested-app-authentication-in-your-add-in)

docs/requirement-sets/common/office-add-in-requirement-sets.md

@@ -160,6 +160,14 @@ See [Add-in command requirement sets](add-in-commands-requirement-sets.md).
 
 ---
 
+### NestedAppAuth
+
+| Minimum Office application support | Methods in set |
+|:-----|:-----|
+| See [Nested app auth requirement sets](nested-app-auth-requirement-sets.md) | Supports nested app auth and the `Office.auth.getAuthContext` method. |
+
+---
+
 ### OoxmlCoercion
 
 | Minimum Office application support | Methods in set |