How to Fix Cannot Add Apps to a SharePoint Site
Question details
Users, including site owners with full control, are unable to add apps to a SharePoint site. The App Catalog may be missing, or app request emails are not being received.
- Product
- Microsoft SharePoint
- Device & OS
- not provided
- Scenario
- Attempting to add or request an application within a SharePoint site to extend site functionality.
- Observed behavior
- Users cannot add apps directly despite having full control. The App Catalog option is unavailable, and site owners do not receive email notifications for app requests.
Ensure you have access to the Microsoft 365 Admin Center or SharePoint Admin Center, as global or SharePoint admin rights are required to configure organizational App Catalog settings.
Enable the App Catalog in Microsoft 365 Admin Center
The App Catalog must be configured at the organizational level before site owners can add apps to their specific sites.
If the App Catalog is not enabled globally, individual site owners will be unable to add apps regardless of their site-level permissions.
Log in to the Microsoft 365 admin center with administrator credentials and navigate to the SharePoint Admin Center from the administrative menus.
Click on 'More features' in the left sidebar menu, locate the 'Apps' section, and select the 'Open' button.
If an App Catalog site does not already exist for your organization, follow the on-screen prompts to create one. This central repository is required before users can add custom or third-party apps.
Configure Site App Request Settings
Ensure that app requests are routed to the correct email address so site owners receive approval notifications.
Verify Site Permissions and Access
Confirm that the user attempting to add the app possesses the correct permission levels on the specific SharePoint site.
Use WPS Office for Seamless Document Collaboration
While SharePoint handles site-level application management, WPS Office provides a lightweight, free alternative to Microsoft Office for creating, editing, and sharing documents. It offers robust functionality without the need for complex server permissions.
Frequently Asked Questions
Why do I need to request an app if I have Full Control of the SharePoint site?
Even with Full Control at the site level, organizational policies set by the Microsoft 365 global administrator may restrict direct app installations. If the global App Catalog settings require tenant-level approval for security reasons, site owners must submit a request first.
How do I test if the app issue is site-specific or organizational?
You can create a new, temporary SharePoint site and attempt to add the app there. If you cannot add the app to the new site either, the issue is likely tied to the organization's global App Catalog configuration rather than isolated site-level permissions.
Why are app request emails not being delivered to the site owner?
Email notifications for app requests may fail if the routing email is left blank in the 'Site app requests' configuration, if it is routing to an outdated administrator email, or if the emails are being caught by spam filters.
