[All hosts] (Yeoman) Add note about workaround to sign in (#5161)

Author: samantharamon

docs/includes/alert-use-https.md

@@ -5,3 +5,5 @@
 > - If this is your first time developing an Office Add-in on your machine, you may be prompted in the command line to grant Microsoft Edge WebView a loopback exemption ("Allow localhost loopback for Microsoft Edge WebView?"). When prompted, enter `Y` to allow the exemption. Note that you'll need administrator privileges to allow the exemption. Once allowed, you shouldn't be prompted for an exemption when you sideload Office Add-ins in the future (unless you remove the exemption from your machine). To learn more, see ["We can't open this add-in from localhost" when loading an Office Add-in or using Fiddler](/office/troubleshoot/office-suite-issues/cannot-open-add-in-from-localhost).
 >
 >    :::image type="content" source="../images/office-loopback-exemption.png" alt-text="The prompt in the command line to allow Microsoft Edge WebView a loopback exemption.":::
+>
+> - When you first use Yeoman generator to develop an Office Add-in, your default browser opens a window where you'll be prompted to sign in to your Microsoft 365 account. If a sign-in window doesn't appear and you encounter a sideloading or login timeout error, run `teamsapp auth login m365`.

docs/includes/outlook-manual-sideloading.md

@@ -1,2 +1,5 @@
 > [!NOTE]
+>
+> - When you first use Yeoman generator to develop an Office Add-in, your default browser opens a window where you'll be prompted to sign in to your Microsoft 365 account. If a sign-in window doesn't appear and you encounter a sideloading or login timeout error, run `teamsapp auth login m365` before running `npm start` again.
+>
 > If your add-in wasn't automatically sideloaded, follow the instructions in [Sideload Outlook add-ins for testing](../outlook/sideload-outlook-add-ins-for-testing.md#sideload-manually) to manually sideload the add-in in Outlook.

docs/outlook/contextless.md

@@ -214,8 +214,7 @@ To activate your add-in with the Reading Pane turned off or without a message se
     npm start
     ```
 
-    > [!TIP]
-    > If your add-in doesn't automatically sideload, follow the instructions in [Sideload Outlook add-ins for testing](sideload-outlook-add-ins-for-testing.md#sideload-manually) to manually sideload it in Outlook.
+    [!INCLUDE [outlook-manual-sideloading](../includes/outlook-manual-sideloading.md)]
 
 1. Navigate to your inbox and do one of the following:
 

docs/outlook/item-multi-select.md

@@ -337,8 +337,7 @@ The following example implements the `getSelectedItemsAsync` and `loadItemByIdAs
     npm start
     ```
 
-    > [!TIP]
-    > If your add-in doesn't automatically sideload, follow the instructions in [Sideload Outlook add-ins for testing](sideload-outlook-add-ins-for-testing.md#sideload-manually) to manually sideload it in Outlook.
+    [!INCLUDE [outlook-manual-sideloading](../includes/outlook-manual-sideloading.md)]
 
 1. In Outlook, ensure the Reading Pane is enabled. To enable the Reading Pane, see [Use and configure the Reading Pane to preview messages](https://support.microsoft.com/office/2fd687ed-7fc4-4ae3-8eab-9f9b8c6d53f0).
 

docs/outlook/sideload-outlook-add-ins-for-testing.md

@@ -1,7 +1,7 @@
 ---
 title: Sideload Outlook add-ins for testing
 description: Use sideloading to install an Outlook add-in for testing without having to first put it in an add-in catalog.
-ms.date: 02/12/2025
+ms.date: 05/06/2025
 ms.topic: how-to
 ms.localizationpriority: medium
 ---
@@ -30,6 +30,9 @@ If you created your Outlook add-in using the [Yeoman generator for Office Add-in
 
 1. Open a command prompt and navigate to the root directory of your Yeoman generated add-in project. Run the command `npm start`.
 
+    > [!TIP]
+    > When you first use Yeoman generator to develop an Office Add-in, your default browser opens a window where you'll be prompted to sign in to your Microsoft 365 account. If a sign-in window doesn't appear and you encounter a sideloading or login timeout error, run `teamsapp auth login m365` before running `npm start` again.
+
 1. Your Outlook add-in will automatically sideload to Outlook on your desktop computer. You'll see a dialog appear, stating there is an attempt to sideload the add-in, listing the name and the location of the manifest file. Select **OK**, which will register the manifest.
 
     > [!IMPORTANT]

docs/quickstarts/excel-quickstart-jquery.md

@@ -38,7 +38,9 @@ The Office Add-ins Development Kit will create the project. It will then open th
 [!include[Dev_kit_stop_debugging](../includes/dev-kit-stop-debugging.md)]
 
 [!include[Dev_kit_troubleshooting](../includes/dev-kit-troubleshooting.md)]
+
 # [Yeoman generator](#tab/yeoman)
+
 ## Prerequisites
 
 [!include[Yeoman generator prerequisites](../includes/quickstart-yo-prerequisites.md)]
@@ -82,12 +84,14 @@ After you complete the wizard, the generator creates the project and installs su
 
 1. [!include[Instructions to stop web server and uninstall dev add-in](../includes/stop-uninstall-dev-add-in.md)]
 
+[!include[The common troubleshooting section for all Yo Office quick starts](../includes/quickstart-troubleshooting-yo.md)]
+
+---
+
 ## Next steps
 
 Congratulations, you've successfully created an Excel task pane add-in! Next, learn more about the capabilities of an Excel add-in and build a more complex add-in by following along with the [Excel add-in tutorial](../tutorials/excel-tutorial.md).
 
-[!include[The common troubleshooting section for all Yo Office quick starts](../includes/quickstart-troubleshooting-yo.md)]
-
 ## Code samples
 
 - [Excel "Hello world" add-in](https://github.com/OfficeDev/Office-Add-in-samples/tree/main/Samples/hello-world/excel-hello-world): Learn how to build a simple Office Add-in with only a manifest, HTML web page, and a logo.