Add instructions for dealing with antivirus related access denied errors (#5247)

Author: AlexJerabek

docs/testing/application-specific-api-error-handling.md

@@ -2,7 +2,7 @@
 title: Error handling with the application-specific JavaScript APIs
 description: Learn about Excel, Word, PowerPoint, and other application-specific JavaScript API error handling logic to account for runtime errors.
 ms.topic: error-reference
-ms.date: 05/15/2025
+ms.date: 06/23/2025
 ms.localizationpriority: medium
 ---
 
@@ -62,7 +62,7 @@ The following tables list the errors that application-specific APIs may return.
 
 |Error code | Error message | Notes |
 |:----------|:--------------|:------|
-|`AccessDenied` |You cannot perform the requested operation.|*None* |
+|`AccessDenied` |You cannot perform the requested operation.| This may be caused by a user's antivirus software blocking parts of Office. See the [Common errors and troubleshooting steps](../testing/testing-and-troubleshooting.md#common-errors-and-troubleshooting-steps) for "Error: Access denied" for more guidance. |
 |`ActivityLimitReached`|Activity limit has been reached.|*None* |
 |`ApiNotAvailable`|The requested API is not available.|*None* |
 |`ApiNotFound`|The API you are trying to use could not be found. It may be available in a newer version of the Office application. See [Office client application and platform availability for Office Add-ins](/javascript/api/requirement-sets) for more information.|*None* |

docs/testing/testing-and-troubleshooting.md

@@ -2,7 +2,7 @@
 title: Troubleshoot user errors with Office Add-ins
 description: Learn how to troubleshoot user errors in Office Add-ins.
 ms.topic: troubleshooting-problem-resolution
-ms.date: 07/08/2024
+ms.date: 06/23/2025
 ms.localizationpriority: medium
 ---
 
@@ -20,6 +20,7 @@ The following table lists common error messages that users might encounter and s
 |:-----|:-----|
 |App error: Catalog could not be reached|Verify firewall settings."Catalog" refers to AppSource. This message indicates that the user cannot access AppSource.|
 |APP ERROR: This app could not be started. Close this dialog to ignore the problem or click "Restart" to try again.|Verify that the latest Office updates are installed, or update with the [Windows Installer](/officeupdates/office-updates-msi).|
+|Error: Access denied. `E_ACCESSDENIED (0x80070005)` | The antivirus software installed on the machine might prevent the host app from creating a WebView2 process. To resolve this issue, add an exemption or exclusion to the antivirus for the `.exe` files in the Office root folder (`C:\Program Files\Microsoft Office\root\Office16`) or for the entire Office root folder. If this does not fix the issue, add an exemption or exclusion for the WebView2 process (`C:\Program Files (x86)\Microsoft\EdgeWebView\Application[latest installed version]\msedgewebview2.exe`). |
 |Error: Object doesn't support property or method 'defineProperty'|Confirm that Internet Explorer is not running in Compatibility Mode. Go to **Tools** > **Compatibility View Settings**.|
 |Sorry, we couldn't load the app because your browser version is not supported. Click here for a list of supported browser versions.|Make sure that the browser supports HTML5 local storage, or reset your Internet Explorer settings. For information about supported browsers, see [Requirements for running Office Add-ins](../concepts/requirements-for-running-office-add-ins.md).|