Kelu cannot index past Intercom conversations as a knowledge source. The ticket source under Add source reads Zendesk only. Here is what you can do with Intercom:

Answer tickets and live chats

Click Connect Intercom and approve, in the same browser. If someone else has to approve, add them to this Kelu workspace as an admin and have them click Connect Intercom. Kelu answers Intercom tickets and, if you turn it on, live Messenger chats in the team inboxes you pick, from your knowledge base.

Index your help articles

If your Intercom help center is public, add it as a Website source.