How can I integrate intranet sources into the chatbot?

Hi everyone,

I currently have the problem that a lot of information that would be very important for the chatbot is stored on our company's intranet.

I would now like to integrate this information and content into the chatbot.
Hence my question:
Is it possible to include intranet content our sources in the voiceflow chatbot and if so, how?
I have tried to store the intranet pages as links in the knowledge base, but the chatbot does not access them when a question is asked.

Is it even possible to integrate the intranet sources into the knowledge base or do I have to use another option for the integration of the intranet sources, such as an API connection or the API development function in the model?

I would be very grateful for any help.