You add your company's public documentation website (docs.contoso.com) as a knowledge source for a Copilot Studio agent. Two weeks later, new documentation pages are published and the agent does not return answers about them. What is the most likely cause and fix?

When you add a website URL as a knowledge source in Copilot Studio, the platform crawls and indexes the content of that site (and its sub-pages, within configured depth limits). This index is what the agent searches when generating answers. The crawl is not continuous — it runs on a schedule.

New pages added to the site after the last crawl will not appear in the agent's responses until the site is re-crawled and re-indexed. The fix is to either wait for the next scheduled crawl, trigger a manual refresh of the knowledge source in the Copilot Studio interface, or configure a more frequent crawl schedule.

Option A (model training cutoff) confuses the knowledge source crawl with the underlying LLM's pretraining. The agent's generative AI answers from the indexed knowledge source, not from its training data. New knowledge source content does not require model retraining.

Option C (manually adding individual URLs) is unnecessary — website knowledge sources are designed to crawl entire sites from a root URL. Manual URL listing defeats the purpose.

Option D (agent caching indefinitely) is incorrect — the knowledge source index is refreshed on the crawl schedule, and republishing the agent does not trigger a knowledge source re-crawl.

Exam note: website knowledge source = crawl-based index with a schedule. To see new content: trigger manual refresh. For time-sensitive content (news, product updates), configure frequent crawl intervals.