[All Hosts] (devx) uninstalling with Teams Toolkit CLI (#5103)

* [All Hosts] (devx) uninstalling with Teams Toolkit CLI

* Update docs/testing/sideload-add-in-with-unified-manifest.md

Co-authored-by: Alison McKay <[email protected]>

* review change

---------

Co-authored-by: Alison McKay <[email protected]>

Author: Rick-Kirkham

docs/testing/sideload-add-in-with-unified-manifest.md

@@ -1,7 +1,7 @@
 ---
 title: Sideload Office Add-ins that use the unified manifest for Microsoft 365
 description: Test your Office Add-in on Windows by sideloading.
-ms.date: 03/27/2025
+ms.date: 03/28/2025
 ms.localizationpriority: medium
 ---
 
@@ -86,7 +86,13 @@ There are two tools you can use to sideload.
     >
     > :::image type="content" source="../images/teams-cli-install.png" alt-text="The command 'teamsapp install --file-path manifests/contoso/contoso.zip' and the system response including the user's account name, the title id GUID and the app id GUID.":::
     >
-    > You'll need this title ID to end the sideloading and debugging session, so save it. We recommend that you put it in a text file in the root of the project and name the file **TitleID.txt**.
+    > You'll need this title ID to end the sideloading and debugging session. It is recorded on Windows computers in the following Registry key: 
+    >
+    > **HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Wef\Developer\OutlookSideloadManifestPath\TitleId** 
+    >
+    > The string "Outlook" is in the key name for historical reasons, but it applies to any add-in installed with the Teams Toolkit CLI.
+    >
+    > Only the most recent add-in installed with the CLI is recorded. If you sideload an add-in with the CLI before you have uninstalled an earlier add-in you installed with the CLI, then there is no record of the earlier add-in's title ID in the Registry. So, we recommend that you also save it in a text file in the root of the project and name the file **TitleID.txt** on both Mac and Windows computers.
 
 1. When you use the Teams Toolkit CLI to start an add-in, *always stop the session with the following command*. Closing the server window doesn't reliably stop the server and closing the Office application doesn't reliably cause Office to unacquire the add-in. Replace "{title ID}" with the title ID of the add-in including the "U_" prefix; for example, `U_90d141c6-cf4f-40ee-b714-9df9ea593f39`.
 

docs/testing/uninstall-add-in.md

@@ -2,7 +2,7 @@
 title: Uninstall add-ins under development
 description: Learn how to prevent incomplete uninstallation of add-ins you are developing and how to remove incompletely uninstalled add-ins under development.
 ms.topic: troubleshooting-problem-resolution
-ms.date: 02/12/2025
+ms.date: 03/28/2025
 ms.localizationpriority: medium
 ---
 
@@ -51,6 +51,16 @@ The following list identifies, for each tool, how to uninstall but doesn't descr
 
 To remove a ghost add-in, you need to remove the artifacts that were created when it was last sideloaded, remove it's local registration, and for Outlook add-ins remove it's registration in Exchange.
 
+> [!TIP]
+> There is a fast way to remove a ghost add-in on Windows computers if the add-in was installed with the Teams Toolkit CLI. Try this first, and if it works, you can skip the remainder of this section.
+>
+> 1. Obtain the add-in's title ID from the Registry key **HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Wef\Developer\OutlookSideloadManifestPath\TitleId**. (The string "Outlook" is in the key name for historical reasons, but it applies to any add-in installed with the Teams Toolkit CLI.)
+> 1. Run the following command in a command prompt, bash shell, or terminal. Replace "{title ID}" with the title ID of the add-in including the "U_" prefix; for example, `U_90d141c6-cf4f-40ee-b714-9df9ea593f39`.
+>
+>    ```command line
+>    teamsapp uninstall --mode title-id --title-id {title ID} --interactive false
+>    ```
+
 The process for removing the add-in varies depending on whether the add-in is for Outlook or some other Office application. 
 
 > [!NOTE]