Permission & Access Issues

Fix Open in Desktop App Missing for External SharePoint PowerPoint Files

Elise Williams Sep 28, 2026 868 views

Question details

The user is unable to open a shared external PowerPoint file in the desktop app because the option is unavailable in the browser interface.

How to Fix Open in Desktop App Missing for External SharePoint PowerPoint Files

Product: SharePoint / PowerPoint
Device & OS: not provided
Scenario: Attempting to open and edit a PowerPoint file shared from an external organization's SharePoint tenant via a one-time verification code.
Observed behavior: The file successfully opens and can be edited in the web browser, but the Open in Desktop App button is missing or unavailable.

Before you start

Verify that your PowerPoint desktop application is installed and updated, and identify the IT administrator for the client's SharePoint tenant, as you will need their assistance to adjust external sharing permissions.

Solution 1Recommended

Request Microsoft Entra B2B Guest Access

The most reliable way to enable desktop app editing for external files is to be added as a proper guest user in the client's Microsoft Entra directory.

When a file is shared via an 'Anyone' link or accessed using a one-time passcode, the system does not recognize you as having a Microsoft Entra account in the host tenant. This prevents the browser from securely handing off the session to your desktop application.

To resolve this, the client's administrator must configure their tenant to recognize your account.

Contact the client administrator

Reach out to the IT administrator of the organization that owns the SharePoint tenant sharing the file.

Request Entra B2B integration

Ask the administrator to enable Microsoft Entra B2B integration for their organization if it is not already active.

Get added as a Guest User

Have the administrator add your email address as a Guest User in their Microsoft Entra admin center portal.

Share via Specific user link

Ask the client to reshare the PowerPoint file with you by selecting the 'Specific user' link option instead of the 'Anyone' link.

Request Microsoft Entra B2B Guest Access

Authentication Requirement: One-time passcodes are designed for quick browser access and fundamentally do not support opening files in desktop applications due to security architecture.

Solution 2

Download, Edit Locally, and Upload

If guest access cannot be granted immediately, you can bypass the restriction by downloading the file to edit it locally in your desktop app.

Free Microsoft Office alternative

Edit External PowerPoint Files Seamlessly with WPS Office

If you face constant permission barriers or login limitations with external SharePoint tenants, downloading the file and editing it in WPS Office offers a hassle-free, highly compatible alternative for offline presentation editing.

1. Download the shared file: Download the PowerPoint file from the SharePoint web view to your local machine.
2. Open with WPS Presentation: Launch WPS Office, select Presentation, and open your downloaded .pptx file.
3. Edit freely: Utilize robust editing tools to modify your slides without worrying about external access permissions.

Highly compatible with Microsoft PowerPoint (.pptx) formats without layout distortionEdit presentations smoothly offline, bypassing complex online tenant permissionsLightweight, fast, and features a familiar user interface for seamless migrationCompletely free to download and use for your daily office tasks

microsoft office alternative - wps office

Frequently Asked Questions

Why does the 'Open in Desktop App' button disappear for external users?

This typically occurs when a file is shared via an 'Anyone' link or when the external user authenticates using a one-time passcode. The desktop application requires a recognized Microsoft Entra account in the host tenant to verify permissions securely, which one-time passcodes do not provide.

Can I force a one-time passcode link to open in the desktop app?

No, opening files in the desktop app is entirely unsupported for external users authenticating solely with a one-time passcode. To use the desktop app, you must be formally added as a guest user in the host organization's directory.

Does this permission issue affect files created in my own organization's SharePoint?

No. Files hosted on your own organization's SharePoint tenant will open normally in your desktop application because your account already has the correct native permissions and directory recognition within your own tenant.

Document & File Issues