Intune Line of Business Applications Panel

On the Intune Line of Business Applications panel of the New Catalog Item Wizard, which opens if you select Intune and then Line of Business App on the Software Source panel, you select the Line of business application that you want to add to this catalog item.

Therefore, to search the entire Intune instance for a specific application, you need to use the ID, Display Name, Publisher, and Owner column filters.

Click on the application that you want to associate with this catalog item and click Next.