These are two reasons why the integration is failing after migrating from Classic Knowledge to Lightning Knowledge. The URL formats for articles change when migrating from Classic Knowledge to Lightning Knowledge, so any integration that relies on URLs needs to be updated accordingly. Also, users need to have Modify All permission on the article type object to delete archived articles in Lightning Knowledge, whereas in Classic Knowledge they only needed Delete permission on the article type object. Verified Reference: : URL Formats for Articles Change When Migrating from Classic Knowledge to Lightning Knowledge : Delete Archived Articles in Lightning Knowledge

A customer community is a branded online portal that allows customers to access self-service resources, such as knowledge articles, FAQs, forums, and case management. A knowledge base is a repository of information that can help customers find answers to their questions or issues. Both solutions can help promote call deflection by enabling customers to resolve their own problems without contacting the contact center. Verified Reference: Service Cloud Consultant Certification Guide & Tips, Experience Cloud Overview, Knowledge Overview

These three solutions will help achieve the mission statement of empowering customers to interact with Universal Containers in the way of their choosing. Creating a central "Contact Us" page will provide customers with a clear and easy way to find all the available channels of support, such as phone, email, web, chat, etc. Optimizing the customer community for mobile devices will ensure that customers can access the same support features on their smartphones or tablets as they can on their desktops. Enabling customers to be emailed FAQs by accessing the interactive voice response 24 hours per day will allow customers to get self-service support even when the call center is closed. Verified Reference: Create a Contact Us Page, [Optimize Your Community for Mobile Devices], [Send Email from Interactive Voice Response]