Intune App inventory Graph

Hi RobV​,

I’d check the permission/consent model first. For Intune inventory data, the permission usually needs to be granted at the Graph app level, not only available to the signed-in user. Try with DeviceManagementManagedDevices.Read.All granted and admin-consented, then test again in Graph Explorer or with an app registration. Also keep in mind this is a /beta endpoint, so behavior may not always match the portal experience.