[Outlook] Document support for Exchange Server SE (#5294)

Author: samantharamon

docs/includes/equivalent-add-in-support-note.md

@@ -4,5 +4,6 @@
 > - Excel, Word, and PowerPoint on Windows (Version 1904 or later)
 > - Classic Outlook on Windows (Version 2102 or later) against a supported Exchange server version
 >   - Exchange Online
+>   - Exchange Server Subscription Edition (SE)
 >   - Exchange 2019 Cumulative Update 10 or later ([KB5003612](https://support.microsoft.com/topic/b1434cad-3fbc-4dc3-844d-82568e8d4344))
 >   - Exchange 2016 Cumulative Update 21 or later ([KB5003611](https://support.microsoft.com/topic/b7ba1656-abba-4a0b-9be9-dac45095d969))

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: 07/08/2025
+ms.date: 07/22/2025
 ms.topic: how-to
 ms.localizationpriority: medium
 ---
@@ -17,15 +17,15 @@ This article describes how to implement shared folders (also known as delegate a
 
 The following table shows supported client-server combinations for this feature, including the minimum required Cumulative Update where applicable.
 
-| Client | Exchange Online | Exchange 2019 on-premises<br>(Cumulative Update 1 or later) | Exchange 2016 on-premises<br>(Cumulative Update 6 or later) |
-|---|---|---|---|
-|**Web browser (modern Outlook UI)**|Supported|Not applicable|Not applicable|
-|**Web browser (classic Outlook UI)**|Not applicable|<ul><li>**Shared folders**: Supported</li><li>**Shared mailboxes**: Not applicable</li></ul>|<ul><li>**Shared folders**: Supported</li><li>**Shared mailboxes**: Not applicable</li></ul>|
-|[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Supported|Not applicable|Not applicable|
-|**Windows (classic)**<br>**Shared folders**: Version 1910 (Build 12130.20272) or later<br><br>**Shared mailboxes**: Version 2304 (Build 16327.20248) or later|Supported|Supported\*|Supported\*|
-|**Mac**<br>Version 16.47 or later|Supported|Supported|Supported|
-|**Android**|Not applicable|Not applicable|Not applicable|
-|**iOS**|Not applicable|Not applicable|Not applicable|
+| Client | Exchange Online | Exchange Server Subscription Edition (SE) | Exchange 2019 on-premises<br>(Cumulative Update 1 or later) | Exchange 2016 on-premises<br>(Cumulative Update 6 or later) |
+|---|---|---|---|---|
+|**Web browser (modern Outlook UI)**|Supported|Not applicable|Not applicable|Not applicable|
+|**Web browser (classic Outlook UI)**|Not applicable|<ul><li>**Shared folders**: Supported</li><li>**Shared mailboxes**: Not applicable</li></ul>|<ul><li>**Shared folders**: Supported</li><li>**Shared mailboxes**: Not applicable</li></ul>|<ul><li>**Shared folders**: Supported</li><li>**Shared mailboxes**: Not applicable</li></ul>|
+|[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Supported|Not applicable|Not applicable|Not applicable|
+|**Windows (classic)**<br>**Shared folders**: Version 1910 (Build 12130.20272) or later<br><br>**Shared mailboxes**: Version 2304 (Build 16327.20248) or later|Supported|Supported\*|Supported\*|Supported\*|
+|**Mac**<br>Version 16.47 or later|Supported|Supported|Supported|Supported|
+|**Android**|Not applicable|Not applicable|Not applicable|Not applicable|
+|**iOS**|Not applicable|Not applicable|Not applicable|Not applicable|
 
 > [!NOTE]
 > \* Support for this feature in an on-premises Exchange environment is available starting in classic Outlook on Windows Version 2206 (Build 15330.20000) for the Current Channel and Version 2207 (Build 15427.20000) for the Monthly Enterprise Channel.

docs/outlook/onmessagefromchanged-onappointmentfromchanged-events.md

@@ -1,7 +1,7 @@
 ---
 title: Automatically update your signature when switching between Exchange accounts
 description: Learn how to automatically update your signature when switching between Exchange accounts through the OnMessageFromChanged and OnAppointmentFromChanged events in your event-based activation Outlook add-in.
-ms.date: 07/17/2025
+ms.date: 07/22/2025
 ms.topic: how-to
 ms.localizationpriority: medium
 ---
@@ -25,23 +25,23 @@ The following tables list client-server combinations that support the `OnMessage
 
 # [OnMessageFromChanged event](#tab/message)
 
-|Client|Exchange Online|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later)|
-|-----|-----|-----|-----|
-|**Web browser (modern UI)**<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Supported|Not applicable|Not applicable|
-|**Windows (classic)**<br>Version 2304 (Build 16327.20248) or later|Supported|Supported|Supported|
-|**Mac**<br>Version 16.77 (23081600) or later|Supported|Not applicable|Not applicable|
-|**iOS**<br>Version 4.2502.0|Supported|Not applicable|Not applicable|
-|**Android**<br>Version 4.2502.0|Supported|Not applicable|Not applicable|
+|Client|Exchange Online|Exchange Server Subscription Edition (SE)|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later)|
+|-----|-----|-----|-----|-----|
+|**Web browser (modern UI)**<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Supported|Not applicable|Not applicable|Not applicable|
+|**Windows (classic)**<br>Version 2304 (Build 16327.20248) or later|Supported|Supported|Supported|Supported|
+|**Mac**<br>Version 16.77 (23081600) or later|Supported|Not applicable|Not applicable|Not applicable|
+|**iOS**<br>Version 4.2502.0|Supported|Not applicable|Not applicable|Not applicable|
+|**Android**<br>Version 4.2502.0|Supported|Not applicable|Not applicable|Not applicable|
 
 # [OnAppointmentFromChanged event](#tab/appointment)
 
-|Client|Exchange Online|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later)|
-|-----|-----|-----|-----|
-|**Web browser (modern UI)**<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Not applicable|Not applicable|Not applicable|
-|**Windows (classic)**|Not applicable|Not applicable|Not applicable|
-|**Mac**<br>Version 16.77 (23081600) or later|Supported|Not applicable|Not applicable|
-|**iOS**|Not applicable|Not applicable|Not applicable|
-|**Android**|Not applicable|Not applicable|Not applicable|
+|Client|Exchange Online|Exchange Server Subscription Edition (SE)|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later)|
+|-----|-----|-----|-----|-----|
+|**Web browser (modern UI)**<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Not applicable|Not applicable|Not applicable|Not applicable|
+|**Windows (classic)**|Not applicable|Not applicable|Not applicable|Not applicable|
+|**Mac**<br>Version 16.77 (23081600) or later|Supported|Not applicable|Not applicable|Not applicable|
+|**iOS**|Not applicable|Not applicable|Not applicable|Not applicable|
+|**Android**|Not applicable|Not applicable|Not applicable|Not applicable|
 
 ---
 

docs/outlook/onmessagesend-onappointmentsend-events.md

@@ -1,7 +1,7 @@
 ---
 title: Handle OnMessageSend and OnAppointmentSend events in your Outlook add-in with Smart Alerts
 description: Learn about the Smart Alerts implementation and how it handles the OnMessageSend and OnAppointmentSend events in your event-based Outlook add-in.
-ms.date: 06/10/2025
+ms.date: 07/22/2025
 ms.topic: concept-article
 ms.localizationpriority: medium
 ---
@@ -19,14 +19,14 @@ Smart Alerts is available through the event-based activation feature. To underst
 
 The following table lists supported client-server combinations for the Smart Alerts feature, including the minimum required Exchange Server Cumulative Update where applicable. Excluded combinations aren't supported.
 
-|Client|Exchange Online|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later) |
-|-----|-----|-----|-----|
-|**Web browser (modern UI)**|Yes|Not applicable|Not applicable|
-|[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Yes|Not applicable|Not applicable|
-|**Windows** (classic)<br>Version 2206 (Build 15330.20196) or later|Yes|Yes|Yes|
-|**Mac**<br>Version 16.65 (22082700) or later|Yes|Not applicable|Not applicable|
-|**Android**|Not applicable|Not applicable|Not applicable|
-|**iOS**|Not applicable|Not applicable|Not applicable|
+|Client|Exchange Online|Exchange Server Subscription Edition (SE)|Exchange 2019 on-premises (Cumulative Update 12 or later)|Exchange 2016 on-premises (Cumulative Update 22 or later) |
+|-----|-----|-----|-----|-----|
+|**Web browser (modern UI)**|Yes|Not applicable|Not applicable|Not applicable|
+|[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Yes|Not applicable|Not applicable|Not applicable|
+|**Windows** (classic)<br>Version 2206 (Build 15330.20196) or later|Yes|Yes|Yes|Yes|
+|**Mac**<br>Version 16.65 (22082700) or later|Yes|Not applicable|Not applicable|Not applicable|
+|**Android**|Not applicable|Not applicable|Not applicable|Not applicable|
+|**iOS**|Not applicable|Not applicable|Not applicable|Not applicable|
 
 > [!IMPORTANT]
 > Enhancements to the Smart Alerts feature were introduced in later requirement sets. Because of this, the minimum supported Outlook version and build may vary. The requirement sets and versions needed for a feature are mentioned in the [walkthrough](smart-alerts-onmessagesend-walkthrough.md) and applicable sections of this article.

docs/outlook/outlook-on-send-addins.md

@@ -1,7 +1,7 @@
 ---
 title: On-send feature for Outlook add-ins
 description: Provides a way to handle an item or block users from certain actions, and allows an add-in to set certain properties on send.
-ms.date: 07/02/2025
+ms.date: 07/22/2025
 ms.localizationpriority: medium
 ---
 
@@ -35,12 +35,12 @@ For information about limitations related to the on-send feature, see [Limitatio
 
 The following table shows supported client-server combinations for the on-send feature, including the minimum required Cumulative Update where applicable. Excluded combinations are not supported.
 
-| Client | Exchange Online | Exchange 2019 on-premises<br>(Cumulative Update 1 or later) | Exchange 2016 on-premises<br>(Cumulative Update 6 or later) |
-|---|:---:|:---:|:---:|
-|**Web browser**<br>modern Outlook UI<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Yes|Not applicable|Not applicable|
-|**Web browser**<br>classic Outlook UI|Not applicable|Yes|Yes|
-|**Windows (classic)**<br>Version 1910 (Build 12130.20272) or later|Yes|Yes|Yes|
-|**Mac**<br>Version 16.47 (21031401) or later|Yes|Yes|Yes|
+| Client | Exchange Online | Exchange Server Subscription Edition (SE) | Exchange 2019 on-premises<br>(Cumulative Update 1 or later) | Exchange 2016 on-premises<br>(Cumulative Update 6 or later) |
+|---|:---:|:---:|:---:|:---:|
+|**Web browser**<br>modern Outlook UI<br><br>[new Outlook on Windows](https://support.microsoft.com/office/656bb8d9-5a60-49b2-a98b-ba7822bc7627)|Yes|Not applicable|Not applicable|Not applicable|
+|**Web browser**<br>classic Outlook UI|Not applicable|Yes|Yes|Yes|
+|**Windows (classic)**<br>Version 1910 (Build 12130.20272) or later|Yes|Yes|Yes|Yes|
+|**Mac**<br>Version 16.47 (21031401) or later|Yes|Yes|Yes|Yes|
 
 > [!NOTE]
 > The on-send feature was officially released in requirement set 1.8 (see [current server and client support](/javascript/api/requirement-sets/outlook/outlook-api-requirement-sets#requirement-sets-supported-by-exchange-servers-and-outlook-clients) for details). However, note that the feature's support matrix is a superset of the requirement set's.

docs/outlook/testing-and-tips.md

@@ -85,7 +85,7 @@ Deciding what versions of the Outlook client to test depends on your development
 
 Consumer and Microsoft 365 account users see the modern UI version when they access Outlook on the web and no longer see the classic version which has been deprecated. However, on-premises Exchange servers continue to support classic Outlook on the web. Therefore, during the validation process, your submission may receive a warning that the add-in is not compatible with classic Outlook on the web. In that case, you should consider testing your add-in in an on-premises Exchange environment. This warning won't block your submission to AppSource but your customers may experience a sub-optimal experience if they use Outlook on the web in an on-premises Exchange environment.
 
-To mitigate this, we recommend you test your add-in in Outlook on the web connected to your own private on-premises Exchange environment. For more information, see guidance on how to [Establish an Exchange 2016 or Exchange 2019 test environment](/Exchange/plan-and-deploy/plan-and-deploy?view=exchserver-2019&preserve-view=true#establish-an-exchange-2016-or-exchange-2019-test-environment) and how to manage [Outlook on the web in Exchange Server](/exchange/clients/outlook-on-the-web/outlook-on-the-web?view=exchserver-2019&preserve-view=true).
+To mitigate this, we recommend you test your add-in in Outlook on the web connected to your own private on-premises Exchange environment. For more information, see [Establish an Exchange Server test environment](/Exchange/plan-and-deploy/plan-and-deploy#establish-an-exchange-server-test-environment) and [Outlook on the web in Exchange Server](/exchange/clients/outlook-on-the-web/outlook-on-the-web).
 
 Alternatively, you can opt to pay for and use a service that hosts and manages on-premises Exchange servers. A couple of options are: