How to Let Guest Users Use SharePoint Add-ins

June 4, 2026 ยท Noam R

How to Let Guest Users Use SharePoint Add-ins

By default, external guests cannot use SharePoint add-ins in document libraries unless you allowlist them. This guide shows how.

Required permission: You must be a SharePoint Administrator or have permission to manage the tenant Apps site.

Allowlist the guest

First, open the Apps site permissions page. The shortcut URL is usually:

https://YOURTENANT.sharepoint.com/sites/appcatalog/_layouts/15/user.aspx

Replace YOURTENANT with your SharePoint tenant name. If the shortcut does not work, use the next section to navigate with the UI.

Once you are there, grant the guest read access.

  1. Click Grant Permissions, then enter the guest's email address:
  1. Open Show Options, choose the Read permission level, and click Share.
Screenshot showing Grant Permissions with a guest user field, Read permission level, and Share button

Open the Apps site permissions page from SharePoint admin center

  1. Open the SharePoint admin center.
  2. Go to More features, then under Apps click Open.
Screenshot showing the Apps section on the More features page in SharePoint admin center
  1. On the Manage apps page, click the settings gear in the top-right corner.
  2. In the settings panel, click Site settings.
Screenshot showing the settings gear and Site settings link on the SharePoint Apps site
  1. On the Site settings page, click Site permissions.
Screenshot showing the Site permissions link on the SharePoint Site Settings page

Troubleshooting

If SharePoint cannot find the guest by email, try the full guest user principal name:

guest_email.com#EXT#@yourtenant.onmicrosoft.com

You can find guest user principal names in Microsoft Entra ID users.

Need help?

If the add-in still does not appear for guest users, contact us through our help page and we'll help.