Hi @Vikram Lamba You can restrict the access of an app with application permissions by using scoped access. However, Microsoft Graph API does not provide a direct way to restrict access to a specific set of users through the Azure portal. One possible solution is to implement additional logic in your application to filter the users based on your business requirements. This way, even though the app has access to all users, it will only process the data for the users you specify.
Another approach is to use delegated permissions instead of application permissions. Delegated permissions allow your app to perform operations on behalf of the logged-in user, and you can control which users have access to your app. However, this method requires user authentication and may not be suitable for your use case if you need app-only access without user interaction. Hope this helps!
Please let me know if you have any questions and I can help you further.
If this answer helps you please mark "Accept Answer" so other users can reference it.